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You target a willing creature or an object of medium size or smaller you can see within 20 ft. and teleport to the space they occupy, simultaneously the targeted creature/object is teleported to the space you previously occupied. An unwilling creature can make a DEX saving throw to avoid being teleported. If you or the target of the spell are occupying a space that is obstructed (i.e. inside a wall, tree, etc.) the spell automatically fails. 

At Higher Levels: When this spell is cast at higher levels, the effective range of the spell is increased by 10 ft. for each spell level above 4th.