You summon a unicorn, which appears in an unoccupied space that you can see within range. The unicorn disappears when it drops to 0 hit points or when the spell ends.

The unicorn is friendly to you and your companions for the duration. Roll initiative for the unicorn, which has its own turns. It obeys any verbal commands that you issue to it (no action required by you), as long as they don't violate its alignment. If you don't issue any commands to the unicorn, it defends itself from hostile creatures but otherwise takes no actions. While mounted on it, you can make any spell you cast that targets only you also target the unicorn. You may only summon the unicorn once per day.

At Higher Levels. If you cast this spell using a spell slot of 4th level or higher, the duration is concentration, up to 10 minutes. If you use a spell slot of 5th level or higher, the duration is 1 hour. If you use a spell slot of 7th level or higher, the duration is 8 hours. If you use a 9th level spell slot, the duration is 24 hours. Using a spell slot of 5th level or higher grants a duration that doesn't require concentration.

If you cast this spell with a 9th level spell slot every day for a year, the unicorn is bound to you for life. This bond weakens its ties to its home plane, allowing you to summon it as many times as you wish by casting the spell again. If you summon it within an hour of it dropping to 0 hit points, it returns with 1 hit point and can only use its martial abilities.