Jan Jansen, Chaos Crafter + Dross Scorpion + Mondrak, Glory Dominus + Ashnod's Transmogrant

Jan Jansen, Chaos Crafter

Dross Scorpion

Mondrak, Glory Dominus

Ashnod's Transmogrant

How it works

1. Activate Ashnod's Transmogrant by tapping and sacrificing it, putting a +1/+1 counter on Jan Jansen and causing it to become an artifact creature.
2. Activate Jan Jansen's first ability by tapping it and sacrificing another artifact creature.
3. When the creature dies, Dross Scorpion triggers, untapping Jan Jansen.
4. Resolve the Jan Jansen ability, creating four Treasure tokens.
5. Activate Jan Jansen's second ability by tapping it and sacrificing a Treasure token, creating four 1/1 Construct artifact creature tokens.
6. Activate three Treasures by tapping and sacrificing them, adding 1.
7. Activate Mondrak by paying 1 and sacrificing two Constructs.
8. When the Constructs die, Dross Scorpion triggers twice.
9. Resolve the first trigger, untapping Jan Jansen.
10. Repeat steps 2 through 5 one additional time.
11. Resolve the second Dross Scorpion trigger from step 8, untapping Jan Jansen.
12. Resolve the Mondrak ability from step 7, putting an indestructible counter on it.
13. Repeat from step 2.