Self-Awakening With Odium's Investiture

[Trusk'our]

There are limitations on how much one can edit about themselves via Awakening due to Endowment's Intent.

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vandar10

Could someone with enough Breaths use part of them to heal himself without the help of a Returned?? Could the God King have healed himself without Lightsong with enough knowledge?

Brandon Sanderson

The nature of the Warbreaker magic is tied to the shard of Endowment, which is about giving. There are, therefore, things you cannot do for yourself.

RobotAztec

For healing can Big Breaths heal only one person at a time or can you heal a bunch of people at once?(as long as they are not yourself)?

Brandon Sanderson

Legends say you can heal many.

However, you can fuel a magic system with another Shard's power. So, if you were to use Odium's Investiture to fuel Self-Awakening, you likely could change a lot more about yourself since Odium's Intent seems to be the opposite of Endowment's Intent; Odium is about caring about one's own self while Endowment is about giving to others. We even see this with the Fused as they cannot seem to do as much as Radiants when it comes to something that doesn't involve themselves.