Weird Arcana - Insane (New Oracle's Curse)

Here's my last new curse (so far) for the Oracle class.

  

Insane: You were touched by the gods and now are completely mad. You could constantly babble while alone or maybe write in a script that no one else (including you) can understand. You take a –4 penalty on all Wisdom-based skill checks. You’re immune to confusion effects. At 5^th level, you can once per day, as a full-round action, treat your next Knowledge check as a natural 20, even if untrained. At 10^th level, you add commune to your list of spells known and can, once per day, ignore its material component. At 15^th level, once per day, when targeted by a confusion effect, you can choose to automatically suffer its effect and, as an immediate action, inflict the same upon a number of targets equal to your class level (maximum 20 targets). The target saves against the confusion effect using either the original DC or 10 + ½ your class level + your Cha modifier (whichever is greater).