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Rock Hydra (172)

CEI · Intl. Collectors' Edition · rare

Mana cost
Mana value	2.0
Type	Creature — Hydra
Rarity	rare
Colors	R
Power / Toughness	0 / 0
EDHREC rank	27648

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. {R}: Prevent the next 1 damage that would be dealt to this creature this turn. {R}{R}{R}: Put a +1/+1 counter on this creature. Activate only during your upkeep.

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Printings

Limited Edition Alpha — Limited Edition Beta — Unlimited Edition $45.99 Collectors' Edition $8.00 Intl. Collectors' Edition — Revised Edition $3.94 Foreign Black Border — Summer Magic / Edgar — Masters Edition IV — 30th Anniversary Edition — 30th Anniversary Edition $76.99

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Rulings

• 2004-10-04: If put onto the battlefield without casting it from your hand, X will be zero.
• 2004-10-04: Once on the battlefield, the X is considered to be zero when calculating its mana cost.
• 2008-08-01: 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.
• 2008-08-01: 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.