Szeth, Who Weeps as He Kills

Hexproof, Indestructable, Trample
Stormlight 4 (When this creature enters the battlefield create 4 Stormlight artifact tokens)
When Szeth enters the battlefield, exile target creature
When Szeth attacks, defending player sacrifices 4 creatures
Szeth can't attack you or planeswalkers you control
Sacrifice a Stormlight: Szeth gains flying until end of turn
{7} Gain control of Szeth. Untap him. He gains haste and "This creature must attack if able