My gist.

[It's a simple answer, but Anton has found that here he needs to explain himself. It's wearing a touch thin, but he can't fault anyone for it.]

It's a manifestation of my rage and hatred. I keep it bound within me and can unleash it at need--if the need is greater than the collateral damage. But if I lose control, the gist will take over and I will be the one bound within it, and it will blaze a trail of murder as far as it's able.