Alright, some notes on the first ability, Curse of the Black Tongue.

Unfortunately, I cannot approve it as it is, due to a couple of small complications:

1: The ability has far too many possible effects to draw on. While I understand that the idea is to have a form of magical backlash similar to wild magic in D&D, there's potential for misuse considering the effects are decided by you and not a simple roll of the dice. As such, I'm going to have to ask you to outline some limitations on the ability's power, area of effect, and what can appear. You don't have to be super specific, but a general idea of what it can and more importantly cannot do is mostly what I'm looking for.

2: As a precaution, a "Player Characters are only affected by this ability directly if allowed by their writers" to avoid any accusations of power gaming.

Second, a note on your second ability, The Null.

This one is a minor fix, we need a more specific amount of time Aldritch has to be silent for each of the successive "phases" of The Null to manifest, up until its maximum strength and range.

Also, it'd be useful to note that magic powerful or concentrated enough that falls within range of The Null has the potential to completely ignore the draining/weakening effects.

Other than that, i don't see any problems. Please respond when you've made the updates or if you have any questions/concerns about my commentary on the abilities themselves.