Snail Shaman

Found inside the Ancestral Mound in Forgotten Crossroads.

When first meeting Snail Shaman, he'll give you your second spell (if you count focusing soul as a spell), The Vengeful Spirit. Grabbing the Vengeful Spirit will result in the player passing out and waking up on the other side of a gate near Snail Shaman. He asks the player to go kill a beast (an Elder Baldur) residing inside his home (Ancestral Mound). The Elder Baldur can only be killed by using the Vengeful Spirit, as it curls up into an invulnerable state if the Knight approaches into melee range.

Later in the story, another Snail Shaman, possibly a relative of his, can be found trapped (and presumably dead) inside of a large crystal in the Crystallized Mound at the Crystal Peak. Breaking them free yields the Descending Dark spell.