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Rock Hydra

Card Name

Rock Hydra

Mana Cost

X

Type

Creature – Hydra

Rarity

Rare

rules Text

Put X +1/+1 counters (heads) on Hydra. Each point of damage Hydra suffers destroys one head unless is spent. During upkeep, new heads may be grown for apiece.

Legal Formats

Commander, Legacy, Vintage

Not Legal Formats

Alchemy, Brawl, Explorer, Historic, Modern, Pauper, Pioneer, Standard

Rulings

(10/4/2004)
If put onto the battlefield without casting it from your hand, X will be zero.
(10/4/2004)
Once on the battlefield, the X is considered to be zero when calculating its mana cost.
(8/1/2008)
You can activate the activated ability that prevents damage any time, even if no source seems likely to deal damage to you in the near future. It will prevent the next 1 damage that would be dealt this turn, even if that turns out to be much later in the turn.
(8/1/2008)
If damage that would be dealt to Rock Hydra can't be prevented, you still remove a +1/+1 counter from it for each 1 damage dealt.