Uk'atval, Dracon Reactor

Imprint - When Uk'atval, Dracon Reactor enters
the battlefield, exile target nontoken creature.
{x}: Create a token that's a copy of the exiled
creature except it has haste. Exile that token at
the beginning of the next end step. X is the
converted mana cost of the exiled creature.
______________________________________
"Trapped, chained forever"