Manifold Mouse (Showcase) (BLB-318) - Bloomburrow: (Showcase) (Borderless)

Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
At the beginning of combat on your turn, target Mouse you control gains your choice of double strike or trample until end of turn.