Primordial Hydra [Magic 2013] Pro Tour Promos prevent all but 1 of

prevent all but 1 of that damage

and The 1 of 1 Ring (Serialized 001 of 001)

Whenever you tap a Swamp for mana

Set: Future Sight Type: Legendary Creature — Sliver Rarity: Rare Cost: {W}{U}{B}{R}{G} All Sliver creatures get +1/+1 for each other Sliver on the battlefield

(Mana symbols on that permanent remain unchanged

Primordial Hydra [Magic 2013] Pro Tour Promos prevent all but 1 ofSet: Magic 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.