Grease

From Player's Handbook, page 246.

Description
1st-level conjuration


 * Casting Time: 1 action
 * Range: 60 feet
 * Components: V, S, M (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.

Learned By

 * Classes: Artificer, Sorcerer (OCF), Wizard
 * Subclasses: Fighter (Eldritch Knight), Rogue (Arcane Trickster)