Activate any number of Birds, Frogs, Otters and/or Rats by tapping them, adding at least {3}.
Cast Trusty Boomerang by paying {1}.
Valley Floodcaller triggers, giving Birds, Frogs, Otters and Rats you control +1/+1 until end of turn and untapping them.
Activate Trusty Boomerang's equip ability by paying {1}, attaching it to a Bird, Frog, Otter or Rat.
Activate the creature by paying {1} and tapping it, returning Trusty Boomerang from the battlefield to your hand.
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite creature ETB

Infinite creature LTB

Infinite power and toughness for certain creatures until end of turn

Infinite storm count

Infinite untap of some creatures you control

Infinite colored mana

Valley Floodcaller

Trusty Boomerang

A Realm Reborn

Activate a basic land by tapping it, adding {1}.
Activate Earthcraft by tapping a Bird, Frog, Otter or Rat, untapping the basic land.
Repeat steps 1 and 2 two additional times.
Cast Trusty Boomerang by paying {1}.
Valley Floodcaller triggers, giving Birds, Frogs, Otters and Rats you control +1/+1 until end of turn and untapping them.
Activate Trusty Boomerang's equip ability by paying {1}, attaching it to a Bird, Frog, Otter or Rat.
Activate the creature by paying {1} and tapping it, returning Trusty Boomerang from the battlefield to your hand.
Repeat.

Infinite untap of basic lands you control

Earthcraft

Enduring Vitality

Cryptolith Rite

Activate any number of Birds, Frogs, Otters and/or Rats by tapping them, adding at least {G}{G}{G}
Cast Trusty Boomerang by paying {1}.
Valley Floodcaller triggers, giving Birds, Frogs, Otters and Rats you control +1/+1 until end of turn and untapping them.
Activate Trusty Boomerang's equip ability by paying {1}, attaching it to a Bird, Frog, Otter or Rat.
Activate the creature by paying {1} and tapping it, returning Trusty Boomerang from the battlefield to your hand.
Repeat.

Infinite green mana

Citanul Hierophants

Elven Chorus

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