Anir, Matrix Unifier

The power and toughness of other Myr creatures are equal to X/X, where X is the number of Myr creatures you control. Whenever you cast a Myr spell from your hand, you may pay {w}, {B}, {R}, {U}, or {G}, then exile cards from the top of your library until you exile a Myr card of lesser mana value in the color identity of the mana spent to activate this ability. You may cast that card without paying it’s mana value this turn. Put the rest on the bottom in a random order. {/color#ffffff}