, Sacrifice this artifact: Add one mana of any color" and loses all other card types and abilities.Vraska, Betrayal's Sting can spend a quiet turn drawing and proliferating, or immediately neutralize a creature by turning it into a Treasure. Those modes give a black counter deck something useful to do before the ultimate becomes relevant. Her zero ability draws a card, costs one life, and proliferates, potentially increasing her own loyalty along with counters elsewhere on the battlefield.
The Treasure transformation is not destruction or exile. The target loses its creature type and other abilities, leaving its controller an artifact they can sacrifice for mana. Indestructible does not stop that change, but hexproof and other targeting restrictions still matter. Because the permanent remains on the battlefield, effects that later remove the transformation can produce different results from ordinary removal.
Compleated gives you a payment choice when casting Vraska. Spending life for the Phyrexian symbol reduces the mana needed but makes her enter with two fewer loyalty counters. That affects both her immediate safety and how quickly she can reach a larger activation. Choose the discount based on what you intend to do that turn rather than treating it as automatic.
Her ultimate brings a targeted player with fewer than nine poison counters up toward nine; it does not normally give a poison-free player ten by itself. Proliferation can supply the final counter later, while Vorinclex, Monstrous Raider changes the arithmetic. Vraska fits particularly well when poison, loyalty, and creature counters already share space in the deck, allowing the zero ability to advance several useful resources at once.
