Reveillark | Body Double | Shilgengar, Sire of Famine

Cards

Reveillark in your graveyard.
Body Double and
Shilgengar on the battlefield (
Body Double as a copy of
Reveillark).

Activate
Shilgengar by sacrificing
Body Double.
When
Body Double leaves the battlefield, it triggers its
Reveillark ability, returning itself from your graveyard to the battlefield as a copy of
Reveillark.
Resolve the
Shilgengar ability.
Repeat.