Ba Sing Se + Ashnod's Altar + Spelunking + Tireless Provisioner

Ba Sing Se

Ashnod's Altar

Spelunking

Tireless Provisioner

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 untapped due to Spelunking.
4. When Ba Sing Se enters, Tireless Provisioner triggers, creating a Treasure token.
5. Activate the Treasure by tapping and sacrificing it, adding .
6. Repeat.