Cankerous Thirst⁣ - Eventide⁣ (Uncommon)⁣ [116]

Cankerous Thirst is an instant from the Eventide set that offers flexibility by allowing you to either debuff a creature with -3/-3 or buff one with +3/+3, depending on the mana spent. This dual functionality makes it valuable in both removal and combat enhancement strategies, particularly in Golgari decks that can leverage the synergy between life and death. However, keep in mind that its effectiveness can be limited by the availability of the right mana.