Gylwain, Casting Director, Guardian of the Forgotten, and Ashnod's Altar

Prerequisites

• Gylwain, Casting Director on the battlefield
• Guardian of the Forgotten on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing another modified creature
2. When the creature dies, Guardian of the Forgotten triggers, manifesting the top card of your library
3. When the manifested card enters the battlefield, Gylwain triggers, creating a Role token attached to the manifested creature
4. Repeat

Results

• Infinite self-mill
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite sacrifice triggers
• Near-infinite colorless mana