Ba Sing Se + Ashnod's Altar + Lotus Cobra + Archelos, Lagoon Mystic

Ba Sing Se

Ashnod's Altar

Lotus Cobra

Archelos, Lagoon Mystic

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 Archelos.
4. When Ba Sing Se enters, Lotus Cobra triggers, adding .
5. Repeat.