The Chain Veil, Ashnod's Altar, Aphetto Alchemist, Intruder Alarm, and Elspeth, Sun's Champion

Prerequisites

• The Chain Veil on the battlefield
• Ashnod's Altar on the battlefield
• Aphetto Alchemist on the battlefield
• Intruder Alarm on the battlefield
• Elspeth, Sun's Champion on the battlefield
• Aphetto Alchemist does not have summoning sickness

Steps

1. Activate Elspeth's first loyalty ability by putting a loyalty counter on it, creating three 1/1 Soldier creature tokens
2. When the Soldiers enter the battlefield, Intruder Alarm triggers, untapping all creatures
3. Activate Ashnod's Altar twice by sacrificing two Soldiers, adding
4. Activate The Chain Veil by paying and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn
5. Activate Aphetto Alchemist by tapping it, untapping The Chain Veil
6. Repeat

Results

• Infinite activations of loyalty abilities of all other Planeswalkers you control
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of all artifacts you control
• Infinite untap of all creatures