Gerrard, Weatherlight Hero, Loyal Retainers, and Ashnod's Altar

Prerequisites

• Gerrard, Weatherlight Hero on the battlefield
• Loyal Retainers on the battlefield
• Ashnod's Altar on the battlefield
• It is your precombat main phase

Steps

1. Activate Ashnod's Altar by sacrificing Gerrard, adding
2. Gerrard dies, triggering its ability
3. Holding priority, activate Loyal Retainers by sacrificing it, returning Gerrard from your graveyard to the battlefield
4. Resolve the Gerrard trigger, returning all artifact and creature cards put into your graveyard this turn to the battlefield
5. Repeat

Results

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