Requires

Neheb, Dreadhorde Champion must be on the battlefield. Hellkite Charger must be on the battlefield. Ulamog, the Infinite Gyre must be in hand. Neheb and Hellkite Charger do not have summoning sickness. Neheb and Hellkite Charger can not be blocked. The amount of cards in library is a multiple of 7. Mana needed:

Steps

1. Attack with Neheb and Hellkite Charger.
2. Hellkite Charger triggers.
3. Pay to the trigger, gaining an extra combat phase and untapping all creatures you control.
4. Neheb deals combat damage, triggering.
5. With Neheb trigger, discard 7 cards and draw 7 cards, discards Ulamog when able, adding .
6. End combat.
7. Repeat.

Results