Be'lakor, the Dark Master, Dread Slaver, Arcane Adaptation, and Ashnod's Altar

Prerequisites

• Be'lakor, the Dark Master on the battlefield
• Dread Slaver in hand
• Arcane Adaptation on the battlefield
• Ashnod's Altar on the battlefield
• "Demon" chosen with Arcane Adaptation
• available

Steps

1. Cast Dread Slaver by paying
2. When Dread Slaver enters the battlefield, Be'lakor's second ability triggers, causing Dread Slaver to deal damage equal to its power to itself
3. Activate Ashnod's Altar by sacrificing Dread Slaver, adding
4. When Dread Slaver dies, it triggers, returning itself from your graveyard to the battlefield
5. Repeat from step 2

Results

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