Ugin, Opposer of Tyrants

Flying, Hexproof
{3}: Dragons you control get +1/+1 and gain
hexproof until end of turn.
{5}: Exile Ugin and target attacking creature. At
the beginning of the next end step, return Ugin
to the battlefield under its owner's control.
So long as Ugin lives -no- exists, tyranny will
not go uncontested.