Body Launderer + Felidar Guardian + Mikaeus, the Unhallowed + Carrion Feeder

Body Launderer

Felidar Guardian

Mikaeus, the Unhallowed

Carrion Feeder

How it works

1. Activate Carrion Feeder by sacrificing Felidar Guardian.
2. When Felidar Guardian dies, its undying ability and Body Launderer's first ability trigger.
3. Resolve the Body Launderer trigger, causing it to connive.
4. Resolve the Felidar Guardian trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
5. When Felidar Guardian enters the battlefield, it triggers, targeting Body Launderer.
6. Holding priority, activate Carrion Feeder by sacrificing Felidar Guardian.
7. When Felidar Guardian dies, Body Launderer's first ability triggers, causing it to connive.
8. Resolve the Carrion Feeder ability from step 6, putting a +1/+1 counter on it.
9. Resolve the Felidar Guardian trigger from step 5, blinking Body Launderer.
10. Resolve the Carrion Feeder ability from step 1, putting a +1/+1 counter on it.
11. Activate Carrion Feeder by sacrificing Body Launderer.
12. When Body Launderer dies, its undying and second ability triggers.
13. Resolve the undying trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
14. Resolve the second Body Launderer trigger, returning Felidar Guardian from your graveyard to the battlefield.
15. When Felidar Guardian enters the battlefield, it triggers, blinking any other permanent you control.
16. Resolve the Carrion Feeder ability from step 11, putting a +1/+1 counter on it.
17. Repeat.