Jan Jansen, Chaos Crafter + Haunted One + Retribution of the Ancients + Altar of Dementia

Jan Jansen, Chaos Crafter

Haunted One

Retribution of the Ancients

Altar of Dementia

How it works

1. Activate Jan Jansen's first ability by tapping it and sacrificing another artifact creature you control except the Gnome or Artificer.
2. Jan Jansen triggers, causing it and creatures you control that share a creature type with it to get +2/+0 and undying until end of turn.
3. Resolve the Jan Jansen ability, creating two Treasure tokens.
4. Activate Altar of Dementia by sacrificing Jan Jansen.
5. When Jan Jansen dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Jan Jansen's power.
7. Activate Jan Jansen's first ability by tapping it and sacrificing the Gnome or Artificer.
8. When the Gnome or Artificer dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
9. Resolve the Jan Jansen ability, creating two Treasure tokens.
10. Activate a Treasure by tapping and sacrificing it, adding .
11. Activate Retribution of the Ancients by paying and removing the +1/+1 counter from Jan Jansen and the other Gnome or Artificer, giving a creature -2/-2 until end of turn.
12. Repeat from step 4.

This clever loop turns Jan Jansen, Chaos Crafter into a self-sustaining sacrifice engine, heavily amplified by Haunted One granting your commanders both a massive power boost and undying whenever they become tapped. Because Jan Jansen enters the battlefield with a +1/+1 counter from undying, Retribution of the Ancients steps in to efficiently strip those counters away using the black mana generated by sacrificing the Treasure tokens created during the process. Finally, Altar of Dementia capitalizes on Jan Jansen's boosted power to mill out opponents every time the commander hits the graveyard to restart the cycle.