Ghoulcaller Gisa Combos
Ghoulcaller Gisa + Intruder Alarm
Aurelia, the Warleader + Whisper, Blood Liturgist + Ghoulcaller Gisa
Combo result
Infinite combat phases. Infinite combat damage. Infinite creature tokens. Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite untap of creatures you control.
Prerequisites
All permanents on the battlefield without summoning sickness. An opponent cannot block Derevi. You control a permanent that can tap to produce at least {B}.