A.B.A, the Frasco Specimen

Defender, Wither

Changing and Swaying—{b}: A.B.A, the Frasco Specimen switches its power and toughness, loses Defender, and gains First Strike. You may pay {g}. If you do, revert the changes made by this ability.

The Law is Key, Key is King—{2}{b}{g}, {t}: Target player gains a poison counter. They gain an additional poison counter if A.B.A, the Frasco Specimen's power is greater than its toughness.