Hylda of the Icy Crown + Intruder Alarm + Ashnod's Altar + Rimewind Taskmage

Prerequisites

• An opponent controls an untapped creature.
• You control at least four snow permanents.
• Rimewind Taskmage does not have summoning sickness.

Steps

1. 1Activate Rimewind Taskmage by paying and tapping it, tapping target creature an opponent controls.
2. 2Hylda of the Icy Crown triggers, causing you to pay to create a 4/4 Elemental creature token.
3. 3When the Elemental enters the battlefield, Intruder Alarm triggers, untapping all creatures.
4. 4Activate Ashnod's Altar by sacrificing the Elemental, adding .
5. 5Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures