Aotv, Archmage of the Void

Each upkeep, add a void counter to Aotv for each
waste in play. If Aotv has 5 or more void counters,
phase it unless you exile it till next end step.
Metalcraft—When Aotv enters the battlefield,
flip a coin for each creature you don't control.
If heads, that creature deals damage equal to
its power to itself unless its controller takes that
damage or puts a +1/+1 counter on Aotv. If
tails, put -1/-1 counters on the creature equal to
its toughness unless its controller discards a car