Ghoulcaller Gisa, Thornbite Staff, Phyrexian Altar, and Lord of the Accursed

Prerequisites

• Ghoulcaller Gisa on the battlefield
• Thornbite Staff on the battlefield
• Phyrexian Altar on the battlefield
• Lord of the Accursed on the battlefield
• Thornbite Staff attached to Ghoulcaller Gisa
• 1 other creature on the battlefield
• available

Steps

1. Activate Ghoulcaller Gisa's ability to sacrifice a creature and create at least 1 zombie
2. Thornbite Staff allows Ghoulcaller Gisa to untap with her ability
3. Sacrifice the zombie to Ghoulcaller Gisa again to create 3 zombies
4. Thornbite Staff untaps Ghoulcaller Gisa again
5. Sacrifice a zombie to Phyrexian Altar to add to your mana pool
6. Activate Ghoulcaller Gisa's ability to sacrifice a zombie and create 3 zombies
7. Thornbite Staff untaps Ghoulcaller Gisa again
8. Repeat

Results

• Infinite colored mana
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite tokens