You gonna tap that?

Haste : Create a token that's a copy of target nonlegendary creature you control, except it has haste. Sacrifice it at the beginning of the next end step.

Flash Flying When this creature enters, you may tap or untap target permanent.

Whenever a nontoken creature you control enters, you may pay . If you do, create a token that's a copy of that creature, except it has haste and "At the beginning of the end step, sacrifice this permanent."