Ulthar's Phantom Steed

You summon a skeletal steed, its bones wrapped in ghostly flames. This mount appears in an unoccupied space within range and serves you for the duration. The steed has the statistics of a warhorse, but with the following additional traits:

Incorporeal Movement: The steed can move through other creatures and objects as if they were difficult terrain. It takes 1d10 force damage if it ends its turn inside a creature or object.

Deathly Gallop: When the steed dashes, it leaves behind a trail of necrotic energy. Creatures that enter this trail take 2d6 necrotic damage. The steed can be ridden by you or a creature you designate, and it disappears if reduced to 0 hit points or if the spell ends.