Mana Echoes + Phyrexian Altar + Lab Rats

Prerequisites

• You control at least three Rats.

Steps

1. 1Cast Lab Rats with buyback by paying , creating a 1/1 Rat creature token and returning Lab Rats to your hand.
2. 2When the Rat enters the battlefield, Mana Echoes trigger, adding for each Rat you control.
3. 3Activate Phyrexian Altar by sacrificing the Rat, adding .
4. 4Repeat.
5. 5If you control four or more Rats as the combo begins, this combo nets infinite colorless mana.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers
• Infinite storm count