I'm making a custom Magic Item Crafting mechanic for a game I'm going to be running, and I'm looking for ideas to include. The players will get a roll over a week of downtime, and the result of that roll will give them a certain number of points they can invest into any of the abilities they want. This includes Weapons, Armor, Improved Focuses, and other miscellaneous items like rings and stuff. Any ideas on magical effects to implement would be greatly appreciated!

You standard effects would be:

Adv or +1d4 on 1 type of ability checks

Casting spells (either at will or using limited charges)

+X to attack / damage rolls

+X to AC

+X to saving throws

+X to ability checks

Flight speed, climb speed, or burrow speed

Movement speed increase

Resistance to a damage type

Immunity to a condition

Automate / magically animate the use of a typical piece of equipment - e.g. ropes that tie themselves, tents that erect themselves, lanterns that last forever, swords that swing themselves, shields that automatically hover, etc...

Ability to speak / understand a language

Deal an extra Xd6 damage of Y type (weapons only)