Kalista, Spear of Vengeance

Allegiance - Shadow Isles (You may cast Kalista,
Spear of Vengeance from your graveyard if you control
at least one creature with Allegiance - Shadow Isles.)
Soulbond (You may pair this creature with another unpaired creature when either enters the battlefield.)
{b}{b}: Kalista, Spear of Vengeance and its paired creature gains your choice of first strike or
vigilance.