Marneus Calgar, and Mana Echoes

Prerequisites

• Marneus Calgar on the battlefield
• Mana Echoes on the battlefield
• available

Steps

1. Activate Marneus Calgar by paying , creating two 2/2 Astartes Warrior creature tokens
2. When the Astartes Warriors enter the battlefield, Marneus Calgar triggers and Mana Echoes triggers twice
3. Resolve the Marneus Calgar trigger, causing you to draw a card
4. Resolve both Mana Echoes triggers, adding for each Astartes Warrior you control
5. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite colorless mana
• Near-infinite creature tokens
• Near-infinite ETB