Absorb Identity in hand. Biovisionary on the battlefield. You control at least three Shapeshifters. {U} available plus an additional {G}{U} available if you control exactly three Shapeshifters.
Mirror-Mad Phantasm + Absorb Identity
Combo result
Infinite self-mill. Prerequisites
Mirror-Mad Phantasm on the battlefield. Absorb Identity in hand. You control at least one Shapeshifter. {U}{U} available.