Quicksilver Elemental, Touch of Vitae, and Faeburrow Elder

Prerequisites

• Quicksilver Elemental on the battlefield
• Touch of Vitae in hand
• Faeburrow Elder on the battlefield
• available

Steps

1. Cast Touch of Vitae by paying , targeting Faeburrow Elder
2. Activate Quicksilver Elemental by paying , causing it to gain Faeburrow Elder's activated abilities until end of turn
3. Activate Quicksilver Elemental using Faeburrow Elder's ability by tapping it, adding at least
4. Activate Quicksilver Elemental using Faeburrow Elder's ability granted to it by Touch of Vitae by paying , untapping Quicksilver Elemental
5. Repeat from step 2

Results

• Infinite green mana
• Infinite white mana
• Infinite black mana if you control a black permanent
• Infinite red mana if you control a red permanent