Rock Hydra [30th Anniversary Edition] Betrayers of Kamigawa He achieved this by adding

He achieved this by adding black to the deck for Patriarch's Bidding

even the lightest footstep can bring it to the surface

Whenever Cockatrice blocks or becomes blocked by a non-Wall creature

Reverse Type: Sorcery Target creature you control deals damage equal to its power to any target

Rock Hydra [30th Anniversary Edition] Betrayers of Kamigawa He achieved this by addingSet: 30th Anniversary Edition 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 only during your upkeep.