Arise

You attempt to bind the essence of a defeated creature you can see within range that has died within the last hour. Make a spellcasting ability check. The DC equals 10 + the creature's challenge rating (CR). On a success, you store the creature's essence. The spell fails if the corpse was the target of this spell within the last 24 hours. You can store essence from one creature at a time.

As an action, you can summon the stored creature to an unoccupied space you can see within 30 feet of you. The creature is undead, friendly to you and your companions, and obeys your verbal commands (no action required). The creature retains its memories and personality from life but is compelled to serve you. It remains until it drops to 0 hit points or until you summon a different creature, at which point it crumbles to ash. The creature is immune to effects that turn undead or control undead. Once you summon a specific creature's essence, you cannot summon that same creature again until you finish a long rest.

You cannot store or summon a creature with a challenge rating higher than your level.

This spell's storage capacity increases when you reach higher levels: two essences at 5th level, three essences at 11th level, and four essences at 17th level.