Vestian's Carpet

You propel the oil from its container multiplying the amount to cover a 15ft by 15ft square on a surface. Upon landing the oil magically ignites into flame rising 5ft. If a creature occupies the space at the end of its turn they take 2d8 fire damage.

Additionally whenever a creature enters the space, including if the creature was already present during the casting, must pass a Dexterity saving throw. On a failed save the creature 2d8 fire damage, half on a success.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th.