Valley Floodcaller + Retraction Helix + Mana Vault

Valley Floodcaller

Retraction Helix

Mana Vault

How it works

1. Cast Retraction Helix by paying , targeting a Bird, Rat, Otter and/or Frog you control that does not have summoning sickness.
2. Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
3. Resolve Retraction Helix.
4. Cast Mana Vault by paying its mana cost.
5. Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
6. Activate Mana Vault by tapping it, adding CCC.
7. Activate the creature targeted by Retraction Helix by tapping it, returning Mana Vault from the battlefield to your hand.
8. Repeat from step 4.