Ring The Bells!
The ringing of Khenarthic bells can be another interesting mechanic. There will be three kinds of Khenarthic bells in the event. Those who participated in Part II of the campaign are already aware of one: a small bell that Shurranirr carries with her.
That little bell isn't exactly as effective as one would hope, but it can do a decent job when exorcising Lost Cats and removing corruption from people "infected" by a dro-m'Athra. So, when she uses her bell to remove a CP from a character, she will be getting a nice +1 modifier in her rolls.
There will be another big bell that Shudasha will be ringing when tasked to do so. While this one is expected to also support the characters fighting the dro-m'Athra, its main goal is to impact the dro-m'Athra itself giving it a -2 debuff in all of its corrupting attempts for 2 rounds (the round the bell rings and the next one, if the dro-m'Athra hasn't acted yet, or the following 2 rounds, if it has).
And, last but definitely not least, a set of bells that will be at the responsibility of the Khenarthic priests to make ring. This one will affect both the dro-m'Athra and the characters fighting it for as long as it keeps ringing. This will give the dro-m'Athra a -2 modifier to all actions and the characters fighting it a +3 modifier to all actions (yes, it effectively raises their attribute rank).
Now, of course, the dro-m'Athra doesn't have to sit idly and just put up with all these bells. While it might be almost impossible to corrupt them, since they have been recently blessed by Khenarthic priests and said priests will be there to make some of them ring, the dro-m'Athra can still attack them and attempt to destroy them. In that case, they will no longer work and no further buffs or debuffs will be applied by them.