Voracious Spirit-Kin

Ephemeral {4}{g} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, exile it unless you
pay its ephemeral cost. You may cast this card for
as long as it remains exiled in this way.)
Whenever another creature you control
leaves the battlefield, Voracious Spirit-Kin fights target creature you don't control.