Vezti, Heart of Fools

Vezti, Heart of Fools enters the battlefield with X
+1/+1 counters and then flip a coin. If you win
the flip, put an indestructible counter on Vezti.
If you lose the flip, put a -1/-1 counter on each creature you control.
Whenever Vezti attacks, discard a card at random.
Draw cards equal to the CMC of the discarded
card if it was a noncreature card. Otherwise,
Vezti becomes a copy of that card.