Cast Realm-Scorcher Hellkite by paying 4 and sacrificing another artifact, enchantment or token.
When Realm-Scorcher Hellkite enters the battlefield, it and Ganax trigger twice.
Resolve both Realm-Scorcher Hellkite triggers, adding 5.
Resolve both Ganax triggers, creating two Treasure artifact tokens.
Activate Temur Sabertooth by paying 1, returning Realm-Scorcher Hellkite to your hand from the battlefield.
Repeat.
Once you have infinite Treasure tokens, you may sacrifice them for infinite mana, and use Realm-Scorcher Hellkite to deal infinite damage to any target(s).
This looping engine harnesses the power of Elesh Norn, Mother of Machines to double the entry triggers of both Ganax, Astral Hunter and Realm-Scorcher Hellkite whenever the Hellkite is cast. Because Realm-Scorcher Hellkite is bargained upon casting, its doubled entry bonus yields extra mana that easily covers the activation cost of Temur Sabertooth, which bounces the Hellkite back to your hand to repeat the process. Ganax, Astral Hunter continuously feeds this cycle by turning each dual entry into a pair of Treasure tokens, leaving you with an unstoppable surplus of mana and infinite damage to close out the game.