Activate Selvala by paying and tapping it, adding at least 1.
Activate Goblin Bombardment 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 loop relies on recycling Slimefoot and Squee and Selvala, Heart of the Wilds directly from the graveyard to continuously churn out and sacrifice tokens. With Tannuk, Steadfast Second granting your team haste, everything is ready to move the moment it hits the board, while Goblin Bombardment converts every iteration into a steady stream of damage. By using the massive green mana generated from Selvala's tap ability to fuel Slimefoot and Squee's resurrection cost—alongside the Saproling token created upon their return—you have all the fuel necessary to repeat the cycle indefinitely.