Repurposed Enforcer (Showcase, Borderless, Foil)

'Whenever this creature attacks, empower Jace X, where X is the number of creatures you control. (Put that many loyalty counters on a Jace token you control. If you don't control one, first create a blue Jace planeswalker token with "[−1]: Surveil 1" and "[−3]: Draw a card.")