Slimefoot and Squee + Pitiless Plunderer + Sprouting Thrinax + Goblin Bombardment

Slimefoot and Squee

Pitiless Plunderer

Sprouting Thrinax

Goblin Bombardment

How it works

1. Activate Goblin Bombardment twice by sacrificing Sporuting Thrinax and Slimefoot and Squee.
2. When Slimefoot and Squee and Sprouting Thrinax die, Pitiless Plunderer triggers twice and Sprouting Thrinax triggers once.
3. Resolve the Pitiless Plunderer triggers, creating two Treasure artifact tokens.
4. Resolve the Sprouting Thrinax trigger, creating three 1/1 Saproling creature tokens.
5. Activate Goblin Bombardment twice by sacrificing two Saprolings.
6. When the Saprolings die, Pitiless Plunderer triggers twice, creating two Treasure artifact tokens.
7. Resolve the Goblin Bombardment abilities from steps 1 and 5.
8. Activate the Treasures by tapping and sacrificing them, adding 1.
9. Activate Slimefoot and Squee by paying 1 and sacrificing a Saproling.
10. When the Saproling dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
11. Resolve the Slimefoot and Squee ability, returning it and Sprouting Thrinax from your graveyard to the battlefield.
12. When Slimefoot and Squee enter the battlefield, it triggers, creating a 1/1 Saproling creature token.
13. Repeat.

This clever loop uses Goblin Bombardment to sacrifice both Sprouting Thrinax and Slimefoot and Squee, sending them to the graveyard while fueling the engine. Pitiless Plunderer quietly watches the carnage, generating a steady stream of Treasure tokens whenever these creatures and their tokens perish. The resulting death triggers provide both the necessary mana and an army of Saprolings to sacrifice, allowing Slimefoot and Squee to use its own ability to bring itself and Sprouting Thrinax right back to the battlefield to repeat the cycle infinitely.