Mana Vault Combos
Steelfin Whale + Retraction Helix + Mana Vault
Voltaic Construct + The Blackstaff of Waterdeep + Mana Vault
Voltaic Construct + Cyberdrive Awakener + Mana Vault
Trazyn the Infinite + Staff of Domination + Mana Vault
Tidespout Tyrant + Shriekhorn + Mana Vault
Tidespout Tyrant + Codex Shredder + Mana Vault
Tezzeret, Betrayer of Flesh + Voltaic Construct + Mana Vault
Synod Artificer + Unbender Tine + Mana Vault
Synod Artificer + Swift Reconfiguration + Mana Vault
Sydri, Galvanic Genius + Voltaic Construct + Mana Vault
Animating Faerie + Voltaic Construct + Mana Vault
Rimewind Taskmage + Illusionist's Bracers + Mana Vault
Combo result
Infinite mana permanents you control can produce. Infinite untap of permanents you control.
Prerequisites
All permanents on the battlefield. Illusionist's Bracers attached to Rimewind Taskmage. Rimewind Taskmage does not have summoning sickness. You control at least four snow permanents.