Dragonic Overlord - Envoy of Destruction

You must Tribute 3 Dragon-Type monsters to Normal Summon this card (you cannot Set this card). This card cannot be targeted by Spells, Traps, Spell/Trap effects, or Effect Monster effects. Once per turn, you can pay 1000 Life Points to destroy all other cards on the field. Once, you can pay 2000 Life Points to Special Summon as many Dragon-Type monsters as possible with 2000 or less DEF from your Graveyard. When this card is removed from the field, Banish all monsters that were Special Summoned by this effect.