Talisman of the Sphere
Source: Dungeon Master's Guide
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 x your Intelligence modifier.
