Procel) Find this ghosty female head that rears up from water in Subterranean Hell Acquiring the ability occurs when you acquire her soul so keep at her as you would any other monster. The Procel ability allows you to move through water at a normal pace.
Mud Demon)This is the male equivalent of Procel a muddy head that rears up from the mud in The Abyss. Acquire his ability the same way you acquired Procel's ability. Mud Demon allows you to move through mud (which you find only in The Abyss) at a normal pace.
Hippogryph: You don't have to fight anything! At the bottom of the second mud room in The Abyss, you'll find a shiny chalice. Smash it to get the Hippogryph ability which allows you to jump way up by pressing UP on the control pad plus the LEFT shoulder button. A must! It's about the only way to help you polish off the final boss.