Grease

1st-Level Conjuration
Casting Time: 1 action
Range: 60 feet
Components: VSM (a bit of pork rind or butter)
Duration: 1 minute

Slick grease covers the ground in a 10-foot square centered 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. When you cast this spell using a spell slot of 2nd level or higher, the area of the spell increases by 5 feet for each slot level above 1st

Source: PHB 246, SRD

Changelog

Added upcasting option.