Primordial Hydra (Duels of the Planeswalkers Promos) [Duels of the Planeswalkers Promos 2013] 031 you can Special Summon this

you can Special Summon this card (from your hand)

Set: World Championships 2011 Type: Colorless Rarity: Ultra Rare Retreat cost: Colorless

Temper (If you defend with Bloodsheath Skeleta

The set itself contains a whopping 1

The very gorund they walk on

Primordial Hydra (Duels of the Planeswalkers Promos) [Duels of the Planeswalkers Promos 2013] 031 you can Special Summon thisSet: Duels of the Planeswalkers Promos 2013 Type: Creature Hydra Rarity: Mythic Cost: {X}{G}{G} Primordial Hydra enters the battlefield with X +1 +1 counters on it. At the beginning of your upkeep, double the number of +1 +1 counters on Primordial Hydra. Primordial Hydra has trample as long as it has ten or more +1 +1 counters on it.