Ba Sing Se + Phyrexian Altar + Stone-Seeder Hierophant + Biomancer's Familiar

Ba Sing Se

Phyrexian Altar

Stone-Seeder Hierophant

Biomancer's Familiar

How it works

1. Activate Ba Sing Se's second ability by paying 2 and tapping it, earthbending itself.
2. Activate Stone-Seeder Hierophant by tapping it, untapping Ba Sing Se.
3. Activate Ba Sing Se's second ability by paying due to Biomancer's Familiar and tapping it, earthbending another land you control.
4. Activate Phyrexian Altar by sacrificing the other earthbent land, adding .
5. When the land dies, Ba Sing Se triggers, returning the land from your graveyard to the battlefield tapped.
6. When the land enters, Stone-Seeder Hierophant triggers, untapping Stone-Seeder Hierophant.
7. Repeat from step 2.

This clever loop transforms Ba Sing Se into an engine of continuous rebirth by turning its own earthbending ability into a self-sustaining cycle. With Biomancer's Familiar reducing the activation cost of Stone-Seeder Hierophant and other creature abilities, you can repeatedly animate and sacrifice lands. As each land perishes to Phyrexian Altar, Ba Sing Se's built-in clause returns it to the battlefield, immediately triggering Stone-Seeder Hierophant to untap and ready the whole loop to run again.