Voloth, Mana conduit

0: Voloth, Mana conduit's loyalty becomes X. You may return Voloth, mana conduit to your hand, if you do, add X to your mana pool.
-3: Create 2 0/1 colorless Elemental creature token with haste and "Sacrifice this creature: counter target noncreature spell"
-12: Put an emblem onto the battlefield with "whenever an opponent cast a spell, you gain Y, where Y is the converted mana cost of that spell"