In 0.4 GGG is adding a new soul core called: Guatelitzi's Thesis
It was revealed in the 0.4 content update video.
When socketed in boots, you lose 5% of max life while sprinting but gain 25% increased movement speed.
Lich Ascendency has a node called Eternal Life which states:
- Your life cannot change while you have energy shield.
I don't know how this soul core is coded, but if it doesn't require loss of life to gain the bonus then GGG just gave lich free 100 ms. I'll explain.
There are 3 socketable currency the lich can use for ms.
- Guatelitzi's Thesis (added in 0.4)
- Tecrod's Gaze: (Boots) 10% increased Movement Speed when on Low Life
- Farrul rune of the chase: (Boots) 5% increased Movement Speed
There is also a unique darkness enthroned belt gains bonuses from Socketed Items as though it was Boots.
It also grants the socketables 50-100% increased effect.
2 socket (or 3 if corrupted) essence of horror boots grant 100% increased effect of Socketed Items. Lich's are always on low life.
1 Guatelitzi's Thesis + 1 Tecrod's Gaze
in boots = (25 x 2) + (10 x 2) = 70 ms (+ 50 ms while sprinting, +20 ms natively)
Lich's get an addition 50 ms while sprinting, and an additional 20 ms natively.
How much speed does this equate to?
Sprinting grants 50% increased movement speed, and lets assume 30ms boots.
Basic movement speed: 30 (boot ms) + 20 (Tecrod boots socket) =
50 ms for base movement
Sprinting: 50 (sprinting buff) + 50 (Thesis boot socket) + 20 (Tecrod in boots) + 30 (boot ms) =
150 ms while sprinting.
Any other life class attempting to use this same gear would have to overcome a 10% (5 x 2 from belt) = 10% life degen. The belt has 100% increased socket effects so the degen is doubled as well.
If this is coded to grant the bonus ms without life loss then the lich gets 150 ms while sprinting for free. It's insane enough that Tecrod's Gaze is already free and only used by Lich's, but this just takes it's into another lvl.
Mind you this is not accounting for the numerous movement speed nodes they can spec into in the dex section. So it can go even higher.