Sidisi, Regent of the Mire, Sister Hospitaller, Umbral Collar Zealot, and Sky Hussar Combo

Sidisi, Regent of the Mire, Sister Hospitaller, Umbral Collar Zealot, and Sky Hussar

Here's how the cards Sidisi, Regent of the Mire, Sister Hospitaller, Umbral Collar Zealot, and Sky Hussar results in Infinite LTB, Infinite ETB, Infinite sacrifice triggers, Infinite death triggers, Infinite lifegain triggers, Infinite lifegain, Infinite untap of creatures you control, Infinite mana creatures you control can produce, and Infinite surveil 1

Sidisi, Regent of the Mire

Sister Hospitaller

Umbral Collar Zealot

Sky Hussar

Prerequisites

Sidisi, Regent of the Mire on the battlefield
Sister Hospitaller in the graveyard
Umbral Collar Zealot on the battlefield
Sky Hussar on the battlefield

Steps

Activate Sidisi by tapping it and sacrificing Sky Hussar, returning Sister Hospitaller from your graveyard to the battlefield
When Sister Hospitaller enters the battlefield, it triggers, returning Sky Hussar from your graveyard to the battlefield and causing you to gain 5 life
When Sky Hussar enters the battlefield, it triggers, untapping all creatures
Activate Umbral Collar Zealot by sacrificing Sister Hospitaller
Repeat