I heard that is was +2 to all magic skills per merit.
As good of a bonus that is, haven't they kind of killed the whole purpose behind Enlightenment now? Before it was meant to let us cast from the opposite Addendum, something that lacked utility mainly because most of the spells you'd want were subjob spells and the rest would be far more beneficial to just swap Arts (nukes and -nas since you never need just one, even sleep since you may need to sleep multiple enemies with Manifestation). Rather than it having some sense in being able to recast Reraise from Addendum: Black, I'm far more likely to use it in Light Arts to enhance Light Arts spells like Phalanx and Embrava. The whole concept of casting from the opposite Addendum is almost completely dead to me with this. I really have to wonder what they're going to adjust with it now, I hope it's completely revamped at this point.