Skeleton Ship, Intruder Alarm, Geralf's Mindcrusher, and Woe Strider

Prerequisites

• Skeleton Ship on the battlefield
• Intruder Alarm on the battlefield
• Geralf's Mindcrusher on the battlefield
• Woe Strider on the battlefield
• Skeleton Ship does not have summoning sickness
• Geralf's Mindcrusher does not have a +1/+1 counter on it

Steps

1. Activate Woe Strider by sacrificing Geralf's Mindcrusher
2. Geralf's Mindcrusher dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it
3. Geralf's Mindcrusher enters the battlefield, triggering itself and Intruder Alarm
4. Resolve the Geralf's Mindcrusher trigger, causing target player to mill five cards
5. Resolve the Intruder Alarm trigger, untapping all creatures
6. Resolve the Woe Strider ability from step 1, causing you to scry 1
7. Activate Skeleton Ship by tapping it, putting a -1/-1 counter on Geralf's Mindcrusher
8. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite mill
• Infinite sacrifice triggers
• Infinite scry 1
• Infinite self-mill
• Infinite untap of all creatures