River Kelpie, Solemnity, and Ashnod's Altar

Prerequisites

• River Kelpie on the battlefield
• Solemnity on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing River Kelpie, adding
2. River Kelpie's persist triggers, returning it from your graveyard to the battlefield
3. River Kelpie enters the battlefield, causing you to draw
4. Repeat

Results

• Infinite card draw
• Near-infinite colorless mana
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers