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Rock Hydra

Card details, tags, similarity scores, and printings.

Rock Hydra

Creature — Hydra

This creature enters with X +1/+1 counters on it. For each 1 damage that would be dealt to this creature, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage. : Prevent the next 1 damage that would be dealt to this creature this turn. : Put a +1/+1 counter on this creature. Activate only during your upkeep.

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Commander: LegalModern: Not 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

Activated

Mana costs

× 2

Creature kinds

Hydra

Color identity

R

Mana value

Mana value 2

Theme tags

+1/+1 Counters

Timing tags

Timing Sorcery

Type tags

Creature

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Shared traits: Activated, Creature, Timing Sorcery · Same color identity

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Score 0.765unitless formula ranking

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

Shared traits: +1/+1 Counters, Activated, Creature · Same color identity

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Color identity
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Mana cost
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Shared tags

+1/+1 CountersActivatedCreatureTiming Sorcery

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Score 0.765unitless formula ranking

Creature — Elemental Shaman · Mana cost: · Color identity: R

Shared traits: Activated, Creature, Timing Sorcery · Same color identity

Score details
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Color identity
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Score 0.765unitless formula ranking

Creature — Demon Berserker · Mana cost: · Color identity: R

Shared traits: +1/+1 Counters, Creature, Timing Sorcery · Same color identity

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+1/+1 CountersCreatureTiming Sorcery

Hurr Jackal

Score 0.764unitless formula ranking

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

Shared traits: Activated, Creature, Timing Sorcery · Same color identity

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Artifact Creature — Robot · Mana cost: · Color identity: R

Shared traits: Activated, Creature, Timing Sorcery · Same color identity

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Shared traits: Activated, Creature, Timing Sorcery · Same color identity

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Score 0.763unitless formula ranking

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

Shared traits: Activated, Creature, Timing Sorcery · Same color identity

Score details
Text (embedding)
0.875
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Score details
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0.888
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0.888
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Mana cost
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Score 0.761unitless formula ranking

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Shared traits: Timing Sorcery · Same color identity · Matching mana cost

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0.894
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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 (0.583); 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
30th Anniversary Editionen1672022-11-28rare—
30th Anniversary Editionen4642022-11-28rare$76.99
Masters Edition IVen1332011-01-10rare—
Summer Magic / Edgaren1731994-06-21rare$1.00
Foreign Black Borderfr1731994-04-11rare—
Foreign Black Borderde1731994-04-11rare—
Revised Editionde1731994-04-11rare—
Foreign Black Borderit1731994-04-11rare—
Revised Editionit1731994-04-11rare—
Revised Editionfr1731994-04-11rare—
Revised Editionen1731994-04-11rare$3.57
Intl. Collectors' Editionen1721993-12-10rare—
Collectors' Editionen1721993-12-10rare$8.00
Unlimited Editionen1721993-12-01rare$45.99
Limited Edition Betaen1721993-10-04rare—
Limited Edition Alphaen1711993-08-05rare—