Well for example if it’s possible to get the same stat type for all 3 slots that’s +3 movement speed on each one. So that’s +9 movement speed total. Someone is going to cheat to get this I guarantee.
People are getting angry over +3. This is a very significant stat, so don’t pretend it isn’t.
Do the hat stats work in arena? They’ll be working in gvg at least due to the nature of how things are coded. So can you see the problem with how over powered these stats are?

