Doomsday

Untap target creature. It gets +2/+2 until end of turn and can block an additional creature this turn.

Flying, first strike, vigilance, trample, haste, protection from black and from red

Destroy all artifacts, creatures, and enchantments. Cycling 3 (3, Discard this card: Draw a card.)

Flying T: Target attacking or blocking creature gets +1/+1 until end of turn.

Destroy all lands.

When this creature enters, you may return target enchantment card from your graveyard to your hand.

Exile target creature you control, then return that card to the battlefield under your control.

Target player gains 2 life for each creature on the battlefield.