Rock Hydra [Limited Edition Alpha] Magic 2010 Enchanted land has indestructible and

Enchanted land has indestructible and can't be enchanted by other Auras

At the beginning of the upkeep of enchanted enchantment's controller

instead of declaring blockers

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

Rock Hydra [Limited Edition Alpha] Magic 2010 Enchanted land has indestructible andSet: 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.