Body Launderer + Felidar Guardian + Mikaeus, the Unhallowed + Phyrexian Altar

Body Launderer

Felidar Guardian

Mikaeus, the Unhallowed

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Felidar Guardian, adding one mana of any color.
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 Phyrexian Altar by sacrificing Felidar Guardian, adding one mana of any color.
7. When Felidar Guardian dies, Body Launderer's first ability triggers, causing it to connive.
8. Resolve the Felidar Guardian trigger from step 5, blinking Body Launderer.
9. Activate Phyrexian Altar by sacrificing Body Launderer, adding one mana of any color.
10. When Body Launderer dies, its undying and second ability triggers.
11. Resolve the undying trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
12. Resolve the second Body Launderer trigger, returning Felidar Guardian from your graveyard to the battlefield.
13. When Felidar Guardian enters the battlefield, it triggers, blinking any other permanent you control.
14. Repeat.