Nicol bolas, Returned

Flying, Trample, Double Strike, Menace, Indestructible, Cannot be put in graveyards or be
taken control of.
{u}{b}{r},{t}: Destroy target permanent
{u}{u}{b}{b}{r}{r},{t}: End the World (Destroy all creatures, planeswalkers, and enchantments opponent control. Spells can't be cast until your next turn. Put
5 +1/+1 counters on each creature you control. They
gain double strike. Until end of turn, opponents
can't block.)