Choose a creature within 30 feet of you. That creature must make a Constitution saving throw. On a failed save, the creature's speed drops to 0 until the end of their next turn. You may choose another creature within 30 feet of you - that creature's movement speed increases by the same amount, until the end of their next turn.
If the first creature has multiple different movement speeds, each only affects the corresponding movement speed of the second creature, and this spell cannot grant a creature a movement mode it did not already possess. For example, if the first creature has a flying speed of 30, and the second creature already possesses a flying speed, that speed will be increased by 30. However, if the second creature does not have a flying speed, they cannot gain one using this ability.
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