Requires

Burakos, Party Leader must be on the battlefield. Haunted One must be on the battlefield. Relic of Legends must be on the battlefield. Demon's Disciple must be in hand. Retribution of the Ancients must be on the battlefield. Burakos, Party Leader must be your commander. Burakos does not have a +1/+1 counter on it. Mana needed:

Steps

1. Cast Demon's Disciple by paying .
2. When Demon's Disciple enters the battlefield, it triggers.
3. Holding priority, activate Relic of Legends' second ability by tapping Burakos, adding .
4. Burakos triggers, giving it and all creatures you control that share a creature type with it +2/+0 and undying until end of turn.
5. Resolve the Demon's Disciple trigger from step 2, causing you to sacrifice Burakos, and each opponent to sacrifice a creature or planeswalker.
6. When Burakos dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. Activate Retribution of the Ancients by paying and removing the +1/+1 counter from Burakos, giving Demon's Disciple -1/-1 until end of turn.
8. Demon's Disciple dies as a state-based action due to having 0 toughness, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter from it.
9. Repeat steps 2 through 6 one additional time.
10. Activate Retribution of the Ancients by paying and removing the +1/+1 counter from Burakos and Demon's Disciple, giving Demon's Disciple -2/-2 until end of turn.
11. Repeat from step 8.

Results