Rock Hydra [Limited Edition Beta] Dark Revelation Volume 1 If that card is a

If that card is a monster

Normal Monsters on your side of the field that include "Elemental Hero" in their card names can attack your opponent's Life Points directly

they flow restlessly from one shape to another

Enchanted creature can't be blocked except by Walls

Rock Hydra [Limited Edition Beta] Dark Revelation Volume 1 If that card is aSet: Limited Edition Beta Type: Creature Hydra Rarity: 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.