Tasha's Cauldron of Everything
The item is immune to any spell or effect that would alter its form.
When any creature starts its turn within 10 feet of the item, the item can increase or decrease (your choice) the walking speed of that creature by 10 feet until the end of the turn, provided the item isn't incapacitated.
Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target you can see. Hit: 1d10 + PB force damage.