You can now conjure flammable, or non-flammable Grease.
Grease can be placed on a Flat survase, Object (worn, or alone), or vertical face.
A creature that only moves 5 feet while standing, or prone and ends it turn in the grease gains advantage on their saving throw,
Flammable Grease:
If you conjure flammable grease, it burns for up to the duration of the spell, and deals 1d6 fire damage to any creature touching it when ignited.
When a creature enters the grease fire for the first time on their turn, or starts its turn in the grease fire, it takes 1d6 fire damage.
While the grease is ignited: Roll a d6 on Initiative count 20; On a 1 the spell ends early and the fire quenches.
Other Uses:
If you cast Grease on an object, a creature handling the object must succeed on a Dexterity Saving throw, or have disadvantage on any action involving handling the object. (eg: drinking a potion, throwing a stone,). If a creature fails by 5 or more, they drop the item, and it falls into an adjacent square of the GM's choice.
If you cast Grease on a worn object, such as armor, any attempts to grapple the creature wearing the object has disadvantage.
If you cast Grease on a vertical face, any creature attempting to climb must succeed on a Dexterity saving throw, on a failure, they decend the surface to the beginning of the Greased area.