Item: Belt of Giant Strength

Apex: When you Invest an Item that has the apex trait, it improves one of your attributes, either increasing the attribute’s modifier by 1 or to a total of +4, whichever would give you a higher score. This gives you all the benefits of the new attribute modifier until the investiture runs out: increasing Intelligence lets you become trained in an additional skill and learn a new language, increasing Constitution gives you more Hit Points, and so on. An apex item grants this benefit only the first time it’s invested within a 24-hour period, and you can benefit from only one apex item at a time. If you attempt to invest an apex item when you already have one invested, you don’t gain the attribute modifier increase, though you do gain any other effects of Investing the Item.

Invested: A character can invest only 10 magical items that have the invested trait. None of the magical effects of the item apply if the character hasn’t invested it, nor can it be activated, though the character still gains any normal benefits from wearing the physical item (like a hat keeping rain off their head).