Petradon
{6}{R}{R}
Creature -- Nightmare Beast
5/6
When ~this~ enters, exile two target lands.
When ~this~ leaves the battlefield, return the exiled cards to the battlefield under their owners' control.
{R}: ~this~ gets +1/+0 until end of turn.
Worldgorger Dragon
{3}{R}{R}{R}
Creature -- Nightmare Dragon
7/7
Flying, trample
When ~this~ enters, exile all other permanents you control.
When ~this~ leaves the battlefield, return the exiled cards to the battlefield under their owners' control.