A very thematic way for charms and sets to Diablo IV as one

Make them seals/tattoos

Let’s say you can have up to 4* empowering seals on your body

They are consumables in the way once imprinted on you, the template is destroyed. They are basically d2 charms but instead of being in your inventory, you apply them on your own skin

They could be individually working buffs like charms were in diablo 2

But they could also come in more elaborated multiple parts ones, hence the sets

Each part representing an aspect of the seal,for example:

  • main topic

  • background

  • lighting

  • fioritura

https://ibb.co/Yk0JzSC

Thematically the complex multipart ones could be back only due to size but also justified by it being where Angel wings root in

This makes even more sense considering Diablo 4 promo is hellbent on Inking people with diablo imagery lol