Art: Christopher Rush

Limited Edition Beta · LEB #172 · Rare
Rock Hydra
Creature — Hydra · 0/0
Market price · TCGplayer
$159.94
$159.94
$159.94
Other printings
8-
$14.98
30th Anniversary Edition 30A #167
-
$76.99
30th Anniversary Edition 30A #464
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No price
Summer Magic / Edgar SUM #173
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$3.92
Revised Edition 3ED #173
-
$8.52
Intl. Collectors' Edition CEI #172
-
$8.00
Collectors' Edition CED #172
-
$48.15
Unlimited Edition 2ED #172
-
No price
Limited Edition Alpha LEA #171
Official rulings
4
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If put onto the battlefield without casting it from your hand, X will be zero.
October 4, 2004
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Once on the battlefield, the X is considered to be zero when calculating its mana cost.
October 4, 2004
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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.
August 1, 2008
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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.
August 1, 2008