gimme ideas for perks in my mod please.

so basically in my mod, you can select 2 perks on your character via a menu. every perk needs to be unlocked (preferably in an interesting way) before use. perks have both upsides and downsides with better upsides leading to worse downsides.

some ideas for obtaining the perk you may have come up with if you can't think of any:
a custom boss that drops an item you use to unlock it (item unlocks make use of special potential orbs, so if you feel like it maybe come up with a design for said orb)
an item you craft (same thing about item unlocks as the boss one)
an achievement that unlocks it

Good luck coming up with ideas, I will give credit if I use your idea in the mod.

(edit: I suppose it would be smart to show you the code of the things so you could better understand how it works so here is an Imgur link to an ability I made https://imgur.com/a/JBv0o6e