Wrath of the Gods

Destroy all creatures. They can't be regenerated.
If you control Winged Dragon of Ra, Obelisk the Tormentor, and Slifer, The Sky Dragon, instead destroy all creatures you don't control, then put
into play every creature that was put into the graveyard this way under your control.
"Whoever acquires all three rare cards will reign
at the top of all duelists with an undefeated legend."
- Ishizu Ishtar