Thilvis, Soul Poacher

Haste
{t}, Exile a creature card from your graveyard
with a soul counter on it.
Thilvis, Soul Poacher gets +X/-X where X is the
total power of cards with soul counters on them.
Thilvis, Soul Poacher gets -X/+X where X is the
total toughness of cards with soul counters on
them.
Sacrifice a creatures: Untap Thilvis, Soul
Poacher, activate only as sorcery.