Activate Squirrel Wrangler by paying {1}{G} and sacrificing Drownyard Temple, creating two 1/1 Squirrel creature tokens.
Both Squirrel tokens enter the battlefield, triggering Mana Echoes twice.
Resolve both Mana Echoes triggers, adding {C}{C} for each Squirrel on the battlefield.
Activate Drownyard Temple by paying {3}, returning it from your graveyard to the battlefield tapped.
Activate Signpost Scarecrow by paying {2}, adding {G}.
Repeat.

Infinite colored mana

Infinite colorless mana

Infinite creature tokens

Infinite landfall triggers

Infinite power and toughness for certain creatures until end of turn

Squirrel Wrangler

Signpost Scarecrow

Mana Echoes

Drownyard Temple

Activate Squirrel Wrangler by paying {1}{G} and sacrificing Drownyard Temple, creating two 1/1 Squirrel creature tokens.
Both Squirrel tokens enter the battlefield, triggering Mana Echoes twice.
Resolve both Mana Echoes triggers, adding {C}{C} for each Squirrel on the battlefield.
Activate Drownyard Temple by paying {3}, returning it from your graveyard to the battlefield tapped.
Activate Prismite by paying {2}, adding {G}.
Repeat.

Prismite

Activate Squirrel Wrangler by paying {1}{G} and sacrificing Drownyard Temple, creating two 1/1 Squirrel creature tokens.
Both Squirrel tokens enter the battlefield, triggering Mana Echoes twice.
Resolve both Mana Echoes triggers, adding {C}{C} for each Squirrel on the battlefield.
Activate Drownyard Temple by paying {3}, returning it from your graveyard to the battlefield tapped.
Activate Stonework Packbeast by paying {2}, adding {G}.
Repeat.

Stonework Packbeast

Activate Squirrel Wrangler by paying {1}{G} and sacrificing Drownyard Temple, creating two 1/1 Squirrel creature tokens.
Both Squirrel tokens enter the battlefield, triggering Mana Echoes twice.
Resolve both Mana Echoes triggers, adding {C}{C} for each Squirrel on the battlefield.
Activate Drownyard Temple by paying {3}, returning it from your graveyard to the battlefield tapped.
Activate Gemstone Array's first ability by paying {2}, putting a charge counter on it.
Activate Gemstone Array's second ability by removing a charge counter from it, adding {G}.
Repeat.

Infinite charge counters on a permanent

Gemstone Array

Activate Squirrel Wrangler by paying {1}{G} and sacrificing Drownyard Temple, creating two 1/1 Squirrel creature tokens.
Both Squirrel tokens enter the battlefield, triggering Mana Echoes twice.
Resolve both Mana Echoes triggers, adding {C}{C} for each Squirrel on the battlefield.
Activate Drownyard Temple by paying {3}, returning it from your graveyard to the battlefield tapped.
Activate Phyrexian Altar by sacrificing a Squirrel token, adding {G}.
Repeat.

Combos with "Squirrel Wrangler"