Child of Alara
{W}{U}{B}{R}{G}
Legendary Creature -- Avatar
6/6
Trample
When ~this~ dies, destroy all nonland permanents. They can't be regenerated.
Hour of Revelation
{3}{W}{W}{W}
Sorcery
~this~ costs {3} less to cast if there are ten or more nonland permanents on the battlefield.
Destroy all nonland permanents.
Planar Cleansing
{3}{W}{W}{W}
Sorcery
Destroy all nonland permanents.
Sanctum of Serra
Plane -- Serra's Realm
When you planeswalk away from ~this~, destroy all nonland permanents.
Whenever chaos ensues, you may have your life total become 20.