Simic Keyrune

Simic Keyrune {3}

Artifact
{T}: Add {G} or {U} to your mana pool.
{G}{U}: Simic Keyrune becomes a 2/3 green and blue Crab artifact creature with hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)
Set: [C15] Commander 2015 ( U · #265 )