Oracle of Amalgam Catacomb

{t}: Add two mana of any color combination. Use this mana only to cast Basilisk, Cephalid, Demon, Devil, Dragon, Eldrazi, Gorgon, Horror, Imp, Kraken, Leech, Leviathan, Nightmare, Octopus, Ooze, Scorpion, Serpent, Skeleton, Slith, Sliver, Slug, Snake, Specter, Spider, Squid, Thrull, Vampire, Werewolf, Wizard, Wurm, or Zombie creature spells.