How about a mask that allows you to absorb the ills from others into your own body?  The true mask of a hero...

There was also the Regeneration Kanoka, and while I did use it in stories to fix stuff, I also used it as a duplicator to regenerate inorganic things like rocks or Vahki...  Although coming up with creative uses for Removes Poison Kanoka was always challenging.

How about a mask that allows you to absorb the ills from others into your own body?  The true mask of a hero...

Ooh, neat. I really like the idea of healers whose power isn't based upon removing damage, but instead transferring it from one target to another. Sort of where I was going with the elemental energy transfer mask. Perhaps it could be used in a more open-ended manner, like trading your own injuries to others to heal yourself? A jerk move against allies but it could be a weaponized form of healing, sort of like a draining attack.

@xccj: Duplicator? You mean like splitting a Vahki in half and repairing both halves to make two wholes? that's definitely a cool idea and I've definitely never thought of it but there might be some restriction in place as to how much it can repair. Like, restoring a lot of physical matter might be too tough, but I can see it kinda "cauterizing" the edges and making the mechanical parts of a machine work again?

What if Removes Poison was a bit less literal? You could maybe use it to diffuse mental unease, as if the problems floating around in someone's mind were a type of poison.

Ooh! Or: there's beneficial bacteria inside the human body, so maybe Matoran have a similar premise as well. If "poison" is open-ended, maybe beneficial microorganisms would be targeted. Use a Remove Poison Kanoka to...actually make somebody sick.