Footage has popped up over at allgamesbeta.com showing off some of the new features in Dark Souls 3. Aside from the expected new abilities and spells, it would appear those new things are powered by a mana bar; when you spend mana on these abilities, you can regain spent mana with blue estus flask.
The boss at the end of the video is quite a site to behold; beautiful in a twisted sort of way, the ghostly towering figure will require the usual skill and patience to defeat. Again, patience is key as players won't be picking this title up till spring of 2016.
As always, more can be found at the game's home page.