Listen to all of Ariel's hints

Talk to Dumah before resurrecting him

Throw 10 vampires into wall spikes

Obtain Fire Glyph

Kill a vampire by flipping a block on them

Infiltrate the Human Citadel

Consume 100 vampire souls in one playthrough

Defeat Rahab

Reach the Abbey's bell tower without touching the water

Obtain Sound Glyph

Defeat the Tomb Guardian

Kill 2 vampires with Force Glyph

Jump into the Lake of the Dead