Noxious Trap

You conjure up to four noxious mushrooms in unoccupied spaces you can see within range. The mushroom is hidden, but a creature can notice it with a successful Wisdom (Perception) check against your spell save DC. When a creature moves to a space within 5ft of a mushroom, it explodes in a 10 foot radius. Each creature within the radius must make a Constitution saving throw. On a failed save, a creature takes 2d8 poison damage and has its speed reduced by half until the end of its turn. On a successful save, the creature takes half as much damage and isn't slowed.

At Higher Levels: When you cast this spell using a spell slot of 5th Level or higher, the number of mushrooms you can create increases by 1