From LSWiki

Surge is the ability to accelerate your metabolism. Your familiar must be present in your environment to activate this charm.

Usage

will my adrenal glands into overdrive

Effects

For both the consort and the familiar, a large bonus to speed, as well as very large bonuses to massive blow, massive exertion, courage, resilience, and steadiness.

A moderate heal effect is also included. - not on the rabbit version.