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Wolfsbane

3rd-level abjuration

Classes: druid, ranger

Casting Time: 1 reaction, which you may take when another creature uses a spell or effect to change its shape.

Range: 90 feet

Components: V, S, M (a handful of animal fur)

Duration: Instantaneous

Whenever creature uses a spell or effect that would change its form, that creature must make a Constitution saving throw. On a failure, the creature does not change shape and takes 4d6 psychic damage. The target’s action is wasted, and if the shapechanging feature has limited uses, one use is also expended.

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