Orcish Bowmasters, Intruder Alarm, Cephalid Looter, and Phyrexian Altar

Prerequisites

• Orcish Bowmasters on the battlefield
• Intruder Alarm on the battlefield
• Cephalid Looter on the battlefield
• Phyrexian Altar on the battlefield
• Cephalid Looter does not have summoning sickness
• You do not control an Army

Steps

1. Activate Cephalid Looter by tapping it, causing target opponent to loot
2. Orcish Bowmasters triggers, dealing 1 damage to any target, then creating a 0/0 Orc Army creature token and putting a +1/+1 counter on it
3. When the Orc Army enters the battlefield, Intruder Alarm triggers, untapping all creatures
4. Activate Phyrexian Altar by sacrificing the Orc Army, adding one mana of any color
5. Repeat

Results

• Infinite draw triggers for opponents
• Infinite looting for opponents
• Infinite self-discard triggers for opponents
• Near-infinite colored mana
• Near-infinite damage
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers
• Near-infinite untap of all creatures