Grease

1st-level conjuration

Casting Time: 1 action
Range: 60 feet
Duration: 1 minute
Components: V, S, M (a bit of pork rind or butter)

Slick grease covers the ground in a 10-foot square centred on a point within range and turns it into difficult terrain for the duration.

When the grease appears, each creature standing in its area must succeed on a Dexterity saving throw or fall prone. A creature that enters the area or ends its turn there must also succeed on a Dexterity saving throw or fall prone.

At Higher Levels:

Spell Lists: Artificer, Sorcerer, Wizard

Source: Player’s Handbook