Ba Sing Se + Ashnod's Altar + Tiller Engine + Lotus Cobra

Ba Sing Se

Ashnod's Altar

Tiller Engine

Lotus Cobra

How it works

1. Activate Ba Sing Se's second ability by paying 2 and tapping it, earthbending itself.
2. Activate Ashnod's Altar by sacrificing Ba Sing Se, adding CC.
3. When Ba Sing Se dies, it triggers, returning itself from your graveyard to the battlefield tapped.
4. When Ba Sing Se enters, Lotus Cobra and Tiller Engine trigger.
5. Resolve the Lotus Cobra trigger, adding .
6. Resolve the Tiller Engine trigger, untapping Ba Sing Se.
7. Repeat.