Moxx Rocks
Menu

Obsidian Fireheart

Card details, tags, similarity scores, and printings.

Obsidian Fireheart

Creature — Elemental

: Put a blaze counter on target land without a blaze counter on it. For as long as that land has a blaze counter on it, it has "At the beginning of your upkeep, this land deals 1 damage to you." (The land continues to burn after this creature has left the battlefield.)

$0.57

Commander: LegalModern: Legal

Save this card

Log in to save cards to your lists.

Start a deck with this card
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

ActivatedTriggered

Mana costs

× 3

Creature kinds

Elemental

Color identity

R

Mana value

Mana value 4

Timing tags

Timing Sorcery

Type tags

Creature

Similar cards

Showing 25–48 of 34,604 candidates

These rankings describe text and metadata resemblance, not synergy, win rates, or claims that a card counters yours.

Rescue

Score 0.472unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.766
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Gridlock

Score 0.472unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.766
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Granny's Payback

Score 0.473unitless formula ranking

Sorcery · Mana cost: · Color identity: G

Shared traits: Timing Sorcery

Score details
Text (embedding)
0.716
Tags and themes
0.167
Color identity
0.000
Mana cost
0.100

Shared tags

Timing Sorcery

Helicarrier Strike

Score 0.474unitless formula ranking

Instant · Mana cost: · Color identity: W

Shared traits: No shared tags

Score details
Text (embedding)
0.770
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Gimme Five

Score 0.474unitless formula ranking

Instant · Mana cost: · Color identity: W

Shared traits: No shared tags

Score details
Text (embedding)
0.770
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Worldly Tutor

Score 0.475unitless formula ranking

Instant · Mana cost: · Color identity: G

Shared traits: No shared tags

Score details
Text (embedding)
0.771
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Cho-Manno's Blessing

Score 0.475unitless formula ranking

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

Shared traits: No shared tags

Score details
Text (embedding)
0.764
Tags and themes
0.000
Color identity
0.000
Mana cost
0.167

No shared tags contributed to this comparison.

Scavenger Hunt

Score 0.475unitless formula ranking

Artifact — Attraction · Mana cost: — · Color identity: Colorless

Shared traits: No shared tags

Score details
Text (embedding)
0.776
Tags and themes
0.000
Color identity
0.000
Mana cost
0.100

No shared tags contributed to this comparison.

Quick Study

Score 0.476unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.752
Tags and themes
0.000
Color identity
0.000
Mana cost
0.250

No shared tags contributed to this comparison.

Mise

Score 0.476unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.773
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Hibernation

Score 0.477unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.753
Tags and themes
0.000
Color identity
0.000
Mana cost
0.250

No shared tags contributed to this comparison.

Trivia Contest

Score 0.477unitless formula ranking

Artifact — Attraction · Mana cost: — · Color identity: Colorless

Shared traits: No shared tags

Score details
Text (embedding)
0.778
Tags and themes
0.000
Color identity
0.000
Mana cost
0.100

No shared tags contributed to this comparison.

Pull from Tomorrow

Score 0.477unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.768
Tags and themes
0.000
Color identity
0.000
Mana cost
0.167

No shared tags contributed to this comparison.

Quicken

Score 0.477unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.775
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Trivia Contest

Score 0.477unitless formula ranking

Artifact — Attraction · Mana cost: — · Color identity: Colorless

Shared traits: No shared tags

Score details
Text (embedding)
0.779
Tags and themes
0.000
Color identity
0.000
Mana cost
0.100

No shared tags contributed to this comparison.

Hornet Sting

Score 0.478unitless formula ranking

Instant · Mana cost: · Color identity: G

Shared traits: No shared tags

Score details
Text (embedding)
0.776
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Long-Term Plans

Score 0.478unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.755
Tags and themes
0.000
Color identity
0.000
Mana cost
0.250

No shared tags contributed to this comparison.

Pay No Heed

Score 0.478unitless formula ranking

Instant · Mana cost: · Color identity: W

Shared traits: No shared tags

Score details
Text (embedding)
0.776
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Dark Ritual

Score 0.478unitless formula ranking

Instant · Mana cost: · Color identity: B

Shared traits: No shared tags

Score details
Text (embedding)
0.776
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Framed!

Score 0.478unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.753
Tags and themes
0.000
Color identity
0.000
Mana cost
0.267

No shared tags contributed to this comparison.

Lim-Dûl's Vault

Score 0.479unitless formula ranking

Instant · Mana cost: · Color identity: UB

Shared traits: No shared tags

Score details
Text (embedding)
0.770
Tags and themes
0.000
Color identity
0.000
Mana cost
0.167

No shared tags contributed to this comparison.

Scavenger Hunt

Score 0.479unitless formula ranking

Artifact — Attraction · Mana cost: — · Color identity: Colorless

Shared traits: No shared tags

Score details
Text (embedding)
0.782
Tags and themes
0.000
Color identity
0.000
Mana cost
0.100

No shared tags contributed to this comparison.

Mystical Tutor

Score 0.479unitless formula ranking

Instant · Mana cost: · Color identity: U

Shared traits: No shared tags

Score details
Text (embedding)
0.778
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

Turn to Dust

Score 0.479unitless formula ranking

Instant · Mana cost: · Color identity: G

Shared traits: No shared tags

Score details
Text (embedding)
0.778
Tags and themes
0.000
Color identity
0.000
Mana cost
0.125

No shared tags contributed to this comparison.

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 (0.586); 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
Archenemy: Nicol Bolasen552017-06-16mythic$0.57
Zendikarfr1402009-10-02mythic—
Zendikaren1402009-10-02mythic$0.82
Zendikares1402009-10-02mythic—
Zendikarzhs1402009-10-02mythic—
Zendikarru1402009-10-02mythic—
Zendikarit1402009-10-02mythic—
Zendikarpt1402009-10-02mythic—
Zendikarde1402009-10-02mythic—
Zendikarja1402009-10-02mythic—