Alexei’s Shadowy Summons

You mutter some arcane words and out of a black misty portal comes a Wraith, ready to do your bidding. Anywhere within 60 feet of you, you can summon a creature from the Shadowfell with a challenge rating equal to the spell level. Using a bonus action to command the creature will do anything you command for 2 hours until time runs out or you drop the spell. You can have either one creature whose challenge rating is equal to the spell level or multiple of lower challenge ratings equal to your spell level.        Creature that you can Summon (depending on spell level)  Darkmantle Banderhobb, Bodak, Ghost, Meazel,  Shadow Mastiff, Specter, Wraith, and most undead (depending on the DM) with corresponding Challenge Ratings.