Wondrous Item, legendary (requires attunement)
When you make an Intelligence (Arcana) check to control a sphere of annihilation while you are holding this talisman, you double your proficiency bonus on the check. In addition, when you start your turn with control over a sphere of annihilation, you can use an action to levitate it 10 feet plus a number of additional feet equal to 10 × your Intelligence modifier.
Notes: Control, Buff, Utility
What a magnificent marvelous MacGuffin!
I love putting things like this in the hands of really low-level PCs--especially in situations where the item isn't immediately useful. It has so much potential as both a magic item and a plot point. Like, 'Congratulations! You've just discovered a legendary artifact that has hold over another legendary artifact.' "Cool! What can we do with it?" 'NOTHING! But some very powerful people are now going to be looking for you! BWAHAHAHAHHA!'
You're such an evil DM, but honestly I am not one to criticize.
I LOVE THIS IDEA! I'm definitely gonna do that in my next campaign
In the "Tomb of Annialhation" Module, Acererak has this.
damn
I feel like this should be called a “Talisman of Annihilation”
That's probably best saved for a version that can forcobly generate a sphere to use.