Tzihra Satwas Matriarch

Rank III - Knight
Mutate {1}{b} (You may play this card for its Mutate
cost, and when you do, place it on over or under a
Being card. The card on top has the abilities and effects
of the card underneath.)
Sith Stone Ritual {t}{b}{b}{b} (Target a Being or
Creature card on the opponent's field and permanently tap
it. The controller of the tapped card loses 2 Vitality at
the start of their turn.)