Siv-Marin, Bloodseeker

Soulbond (You may pair this creature with another unpaired creature when either enters the battlefield.
They remain paired for as long as you control both of
them.)
As long as this card is soulbonded with another creature, both creatures have wither
{t}, {1}{w}{b}: Put a fate counter on Siv-Marin, Bloodseeker or the creature soulbonded with her