Spore Cloud

Biomancy* cantrip

Casting Time: 1 action
Range: Self (5-foot-radius sphere)
Components: V, S, M (a toadstool)
Duration: Instantaneous
Class: Druid, Sorcerer, Warlock

You produce a cloud of virulent spores. Each creature within 5 feet of you, other than you, must succeed on a Constitution saving throw or take 1d4 poison damage. A creature that fails the saving throw by 5 or more is poisoned until the end of its next turn.

At Higher Levels. The spell’s damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).

*can be replaced with conjuration
Source: Heliana's Guide to Monster Hunting