Martyred Rusalka⁣ - Guildpact⁣ (Uncommon)⁣ [12]

Martyred Rusalka is a 1/1 Spirit creature that can be sacrificed for its activated ability. By paying one white mana and sacrificing any creature you control, you can prevent a target creature from attacking that turn, which is particularly useful for stalling your opponent's aggressive strategies or protecting your life total. However, being a low-power creature itself, it doesn't contribute much offensively and requires you to have other creatures on the battlefield to make the most of its ability, which can be a downside if your board is empty.