Reveillark | Body Double | Ashnod's Altar

Cards

Reveillark in your graveyard.
Body Double and
Ashnod's Altar on the battlefield (
Body Double as a copy of
Reveillark).

Activate
Ashnod's Altar by sacrificing
Body Double, adding ({C} magic symbol) ({C} magic symbol) .
When
Body Double leaves the battlefield, it triggers its
Reveillark ability, returning itself from your graveyard to the battlefield as a copy of
Reveillark.
Repeat.