Gerrard, Weatherlight Hero, Nim Deathmantle, and Ashnod's Altar

Prerequisites

• Gerrard, Weatherlight Hero on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• You control at least two additional nontoken creatures

Steps

1. Activate Ashnod's Altar by sacrificing Gerrard and any two other nontoken creatures, adding six
2. Nim Deathmantle and Gerrard trigger
3. Resolve the Nim Deathmantle trigger, causing you to pay to return Gerrard from your graveyard to the battlefield, and attach Nim Deathmantle to it
4. Resolve the Gerrard trigger, returning all artifact and creature cards that were put into your graveyard this turn from your graveyard onto the battlefield
5. Repeat

Results

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