what exactly do these do? i been hearing about em can i geta quick explanation.

like maplestory nexon items
basicly a skin you wear over your items

so say robin hood hat look but can wield anything like slay helm or nothing

oh shiz thats sweet.

You look good in anything, you magnificent fool.

Lol'd goodluck geting primal full helm,

I'm almost positive people don't commonly have a primal full helm.

third day that keepsakes came out everyone and their mom had a pfh

The only way this item may be obtained is as a drop from the Skeletal Horde boss, however it is a very rare item to find. This is owing to the fact that the drop rate of Primal equipment is affected by the combat level of the boss, and the highest combat level of the horde is very low for that of a boss, thus resulting in a very rare chance for a Primal full helm drop.

Lmk.

it's like a 1-110 floors rate or something like that.

Not quite sure what you're getting at, but okay.