Neheb, Dreadhorde Champion | Hellkite Charger | Ulamog, the Infinite Gyre

Cards

Attack with
Neheb and
Hellkite Charger.
Hellkite Charger triggers.
Pay ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) to the trigger, gaining an extra combat phase and untapping all creatures you control.
Neheb deals combat damage, triggering.
With
Neheb trigger, discard 7 cards and draw 7 cards, discards
Ulamog when able, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
End combat.
Repeat.