When Deep Forest Hermit enters the battlefield, it triggers, creating eight 1/1 Squirrel creature tokens.
Activate Phyrexian Altar seven times by sacrificing seven Squirrels, adding 4.
Activate Temur Sabertooth by paying 1, returning Deep Forest Hermit to your hand from the battlefield.
Repeat.
This delightful engine feeds on the sheer reproductive frenzy of Deep Forest Hermit entering the battlefield, which is immediately doubled into an army of eight 1/1 tokens thanks to Mondrak, Glory Dominus's magnificent replacement effect. With the Hermit's static pump bolstering your swarming board, you can comfortably sacrifice seven of those Squirrels to Phyrexian Altar to generate more than enough mana to fund Temur Sabertooth's activation. Bouncing the Hermit back to your hand resets its vanishing counters entirely, allowing you to recast it and repeat the cycle for infinite mana, sacrifices, and token creation.