It will be unlocked in 2 years.

Was just added on JP so 2 years later unless they give it early, which I doubt.

Looks like the feature is so new, it didn't even make it to the event page yet 😋

Well, I hope they'll implement it early, as they've done with other updates.

I can now start to seriously aim for bond 15 for some servants and don't have to use lowest bond anymore...

With this Skill, I now longer have an issue with using the few level 100 Servant that I keep but had never really used that much. (o˘◡˘o)

It's a feature that comes with the Grand Servant, so I doubt it will come to NA earlier

As long as the grand servant is not the only one profiting, there's no reason to link this feature with that update and not give it to us next year.

This is a great feature. It's nowhere near as painful to get to bond 15 anymore as long as you're only using one in the party. Worst case scenario with one bond 15 in the party you're getting 680% total bond vs 725% without a bond 15. Without any bond bonus in the party the numbers are totally even. It you're using 2 bond 15s in the party it gets kind of painful by getting 585% total with 6 CEs, but at least the 3 servants getting bond are getting a huge bonus so you can level them much faster if you really want to level a few specific servants. Not counting Frontline bonus or niche bond CEs so there's lots of variance in the numbers.