Voltaic Construct, Mana Vault, and Cyberdrive Awakener

Prerequisites

• Voltaic Construct on the battlefield
• Mana Vault on the battlefield
• Cyberdrive Awakener in hand
• Mana Vault does not have summoning sickness
• available

Steps

1. Cast Cyberdrive Awakener by paying
2. When Cyberdrive Awakener enters the battlefield, it triggers, causing each noncreature artifact you control to become a 4/4 artifact creature until end of turn
3. Activate Mana Vault by tapping it, adding
4. Activate Voltaic Construct by paying , untapping Mana Vault
5. Repeat from step 3

Results

• Infinite colorless mana