Rock Hydra [International Collectors' Edition] Daretti As long as Siege Behemoth

As long as Siege Behemoth is attacking

Set: Commander Anthology Volume II Type: Artifact Creature — Phyrexian Wurm Rarity: Mythic Cost: {6} Deathtouch

Set: Modern Horizons Type: Legendary Creature — Human Artificer Rarity: Mythic Cost: {2}{U}{U} When Urza

(A creature with islandwalk can't be blocked as long as defending player controls an Island

Set: World Championship Decks 2000 Type: Enchantment Rarity: Rare Cost: {2}{U}{U} Fading 5 (This enchantment enters the battlefield with five fade counters on it

Rock Hydra [International Collectors' Edition] Daretti As long as Siege BehemothSet: International Collectors' 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.