Changeling Titan, Karmic Guide, and Ashnod's Altar

Prerequisites

• Changeling Titan in hand
• Karmic Guide on the battlefield
• Ashnod's Altar on the battlefield
• available

Steps

1. Cast Changeling Titan by paying
2. Changeling Titan enters the battlefield, championing Karmic Guide
3. Activate Ashnod's Altar by sacrificing Changeling Titan, adding
4. Changeling Titan dies, causing Karmic Guide to return to the battlefield from exile
5. Karmic Guide enters the battlefield, returning Changeling Titan from your graveyard to the battlefield
6. Repeat from step 2

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers