Nadeek, Snapping-Blizzard

Whenever you cast a spell, tap target
creature you dont control. Then target opponent
chooses a card at random from you're hand,
discard that card and they gain 1 life
Whenever you tap five or more creatures you
don't control, Transform this creature.
{1}{w/u}{t} Tap target creature you dont control,
taps and doesnt untap during its controllers
next untap step