Every Wanderer has dealt with the disappointment of having poured so much effort (and energy) into the creation of a vortex, only to have it fall apart at the last moments. One particularly clever mage noted that a significant amount of energy is released as a vortex unravels, and it seemed only right that one should be able to harness some of that power. From this idea, 'Absorb Magic' was born.
Whenever a vortex fails to stabilize, you are able to collect energy from the fallout. The nicest thing is that you don't even have to have been connected to the rift in order to get this boost!