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 loop relies on Yarok, the Desecrated to double up the entry triggers, turning a normal dragon-heavy build into an explosive engine. When you cast Realm-Scorcher Hellkite with its bargain cost paid, Yarok makes it yield an extra burst of mana that more than funds the rescue mission. Meanwhile, Ganax, Astral Hunter converts every single re-entry of the Hellkite (and itself, if needed) into extra Treasure tokens to fuel your colored mana reserves. Finally, Temur Sabertooth provides the repeatable bounce effect that resets the Hellkite, allowing you to recast it and convert your surplus mana into infinite damage against any target.