Rock Hydra [Limited Edition Alpha] Magic 2010 You may put that card

You may put that card on the bottom of that player's library

instead of declaring blockers

Reverse Type: Legendary Enchantment Whenever an opponent casts their first spell each turn

but your death will glorify Yawgmoth

Rock Hydra [Limited Edition Alpha] Magic 2010 You may put that cardSet: Limited Edition Alpha Type: Creature Hydra Rare Cost: {X}{R}{R} Rock Hydra enters the battlefield with X +1 +1 counters on it. For each 1 damage that would be dealt to Rock Hydra, 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 Rock Hydra this turn. {R}{R}{R}: Put a +1 +1 counter on Rock Hydra. Activate this ability only during your upkeep.