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River Herald Guide

Card details, tags, similarity scores, and printings.

River Herald Guide

Creature — Merfolk Scout

Vigilance When this creature enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

$0.13

Commander: LegalModern: Legal

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Tags and classifications

Card attributes are distinct from inferred themes. AI themes and predicted tags are suggestions, not rules text; check the card before relying on a surprising classification.

Ability tags

Triggered

Mana costs

× 1

Creature kinds

Merfolk

Classes and roles

Scout

Color identity

G

Keyword tags

ExploreVigilance

Mana value

Mana value 3

Theme tags

+1/+1 Counters

Timing tags

Timing Sorcery

Type tags

Creature

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Shared traits: Creature, Timing Sorcery, Triggered

Score details
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Score 0.569unitless formula ranking

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Shared traits: Creature

Score details
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Color identity
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Mana cost
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Score 0.569unitless formula ranking

Enchantment — Saga · Mana cost: · Color identity: W

Shared traits: Timing Sorcery

Score details
Text (embedding)
0.827
Tags and themes
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Color identity
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Mana cost
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Shared tags

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Score 0.569unitless formula ranking

Creature — Pegasus · Mana cost: · Color identity: W

Shared traits: Creature

Score details
Text (embedding)
0.811
Tags and themes
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Color identity
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Mana cost
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Shared tags

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Koth, Fire of Resistance

Score 0.569unitless formula ranking

Legendary Planeswalker — Koth · Mana cost: · Color identity: R

Shared traits: Timing Sorcery, Triggered

Score details
Text (embedding)
0.824
Tags and themes
0.182
Color identity
0.000
Mana cost
0.375

Shared tags

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Festering Thicket

Score 0.569unitless formula ranking

Land — Swamp Forest · Mana cost: — · Color identity: BG

Shared traits: No shared tags

Score details
Text (embedding)
0.843
Tags and themes
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Color identity
0.500
Mana cost
0.125

No shared tags contributed to this comparison.

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Score 0.569unitless formula ranking

Enchantment Creature — Nightmare · Mana cost: · Color identity: W

Shared traits: Creature, Timing Sorcery, Triggered

Score details
Text (embedding)
0.820
Tags and themes
0.300
Color identity
0.000
Mana cost
0.167

Shared tags

CreatureTiming SorceryTriggered

Showstopper

Score 0.569unitless formula ranking

Instant · Mana cost: · Color identity: BR

Shared traits: Triggered

Score details
Text (embedding)
0.837
Tags and themes
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Color identity
0.000
Mana cost
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Shared tags

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Score 0.569unitless formula ranking

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Shared traits: Creature, Timing Sorcery, Triggered

Score details
Text (embedding)
0.843
Tags and themes
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Color identity
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Mana cost
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Shared tags

CreatureTiming SorceryTriggered

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Score 0.569unitless formula ranking

Legendary Creature — Beast Noble · Mana cost: · Color identity: Colorless

Shared traits: Creature, Timing Sorcery, Triggered

Score details
Text (embedding)
0.848
Tags and themes
0.214
Color identity
0.000
Mana cost
0.167

Shared tags

CreatureTiming SorceryTriggered

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Score 0.569unitless formula ranking

Enchantment · Mana cost: · Color identity: U

Shared traits: Timing Sorcery, Triggered

Score details
Text (embedding)
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Color identity
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Mana cost
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Score 0.569unitless formula ranking

Enchantment · Mana cost: · Color identity: W

Shared traits: Timing Sorcery, Triggered

Score details
Text (embedding)
0.819
Tags and themes
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Color identity
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Mana cost
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Shared tags

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Score 0.569unitless formula ranking

Artifact Creature — Construct · Mana cost: · Color identity: U

Shared traits: Creature, Timing Sorcery, Triggered

Score details
Text (embedding)
0.835
Tags and themes
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Color identity
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Mana cost
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Shared tags

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Score 0.569unitless formula ranking

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Shared traits: Creature, Timing Sorcery

Score details
Text (embedding)
0.853
Tags and themes
0.200
Color identity
0.000
Mana cost
0.167

Shared tags

CreatureTiming Sorcery

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Score 0.569unitless formula ranking

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Shared traits: Creature, Timing Sorcery, Triggered

Score details
Text (embedding)
0.843
Tags and themes
0.231
Color identity
0.000
Mana cost
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Shared tags

CreatureTiming SorceryTriggered

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Score 0.569unitless formula ranking

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Shared traits: Timing Sorcery, Triggered

Score details
Text (embedding)
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Score 0.569unitless formula ranking

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Shared traits: Creature, Timing Sorcery, Triggered

Score details
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Color identity
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Mana cost
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Shared tags

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Score 0.569unitless formula ranking

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Shared traits: Creature, Timing Sorcery

Score details
Text (embedding)
0.845
Tags and themes
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Color identity
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Mana cost
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Score 0.569unitless formula ranking

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Shared traits: Timing Sorcery, Triggered

Score details
Text (embedding)
0.846
Tags and themes
0.182
Color identity
0.000
Mana cost
0.250

Shared tags

Timing SorceryTriggered

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Score 0.569unitless formula ranking

Enchantment — Aura · Mana cost: · Color identity: U

Shared traits: Timing Sorcery, Triggered

Score details
Text (embedding)
0.825
Tags and themes
0.182
Color identity
0.000
Mana cost
0.375

Shared tags

Timing SorceryTriggered

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Score 0.569unitless formula ranking

Creature — Dinosaur · Mana cost: · Color identity: R

Shared traits: Creature, Timing Sorcery

Score details
Text (embedding)
0.846
Tags and themes
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Color identity
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Mana cost
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Shared tags

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Score 0.569unitless formula ranking

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Shared traits: Creature, Timing Sorcery, Triggered

Score details
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Tags and themes
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Color identity
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Mana cost
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Shared tags

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Score 0.569unitless formula ranking

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Shared traits: Creature, Timing Sorcery, Triggered

Score details
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How ranking works

Balanced: 0.60*text + 0.20*tags + 0.10*color + 0.10*cost. Outputs are unitless rankings, not percentages or probabilities. Most similar shows the highest scores; Typical overlap is nearest the catalog median (0.569); Least similar shows the lowest scores.

Text uses cosine resemblance (−1 to 1) between 384-number embeddings when available, or lexical fallback otherwise. Tags use Jaccard overlap of approved tags and AI themes, excluding predicted tags and separately scored color/cost tags. Color compares W/U/B/R/G identity. Mana cost combines mana-value proximity, 1 / (1 + the difference), with mana-symbol overlap. Tags, color, and cost range from 0 to 1.

Model: bge-small-en-v1.5. 34,605 of 34,605 catalog cards currently have embeddings.

Potential relationships

1,031 of 34,605 canonical cards have AI-derived resource labels. Label model: gpt-5.6-luna.

This card is missing AI-derived resource labels, so potential synergies and answers are unavailable. No text or predicted-tag inference is used.

About relationship labels

These labels are AI-derived resource matches, not reviewed or rules-validated interactions. Check deck legality, color identity, costs, timing, restrictions, and the cards themselves.

Printings
SetLanguageCollectorReleasedRarityPrice
The Lost Caverns of Ixalanfr2092023-11-17common—
The Lost Caverns of Ixalanpt2092023-11-17common—
The Lost Caverns of Ixalanes2092023-11-17common—
The Lost Caverns of Ixalanit2092023-11-17common—
The Lost Caverns of Ixalande2092023-11-17common—
The Lost Caverns of Ixalanzhs2092023-11-17common—
The Lost Caverns of Ixalanen2092023-11-17common$0.13
The Lost Caverns of Ixalanja2092023-11-17common—