Activate Selvala by paying and tapping it, adding at least 1.
Activate Umbral Collar Zealot twice by sacrificing Selvala and Slimefoot and Squee.
Activate Slimefoot and Squee by paying 1 and sacrificing a Saproling, returning it and Selvala from your graveyard to the battlefield.
When Slimefoot and Squee enters the battlefield, it triggers, creating a 1/1 Saproling creature token.
Repeat.
This clever engine lets you endlessly recycle your board, fueled by the staggering green mana generated through Selvala, Heart of the Wilds. By using Umbral Collar Zealot to cleanly send your creatures to the graveyard, you feed the exact fuel needed to activate Slimefoot and Squee's resurrection ability, which in turn brings back everything you need while spawning a fresh Saproling token to keep the cycle going. Though Dynaheir, Invoker Adept doesn't actively participate in this specific resurrection loop, her presence rounds out the broader strategy by granting haste to your creatures so they are ready to tap the moment they return.