Mortamor

Dragon Quest · The archfiend

Powers and abilities

Superhuman Physical Characteristics
Magic
Illusion Creation
Reality Warping (Can create and manipulate a universe that is not made of either dream nor reality)
Pocket Reality Manipulation
Spatial Manipulation
Forcefield
Dream Manipulation
Breath Attack
Energy Manipulation
Ice Manipulation
Fire Manipulation
Can negate spells with Disruptive Wave
Resurrection
Healing
Petrification
Transmutation (Turned the people within Gallows Moor into statues or animals)
Soul Manipulation (Summoned monsters into the Great Sage Benjamin's soul and mentally tortured him)
Regeneration
Sealing
BFR
His first form is a possessed puppet
Poison Manipulation
Sound Manipulation
Darkness Manipulation
Explosion Manipulation
Summoning
Can talk telepathically

The legendary Zenithian Equipment.

Ranked tied for #1 of 28 in Dragon Quest by strength.

Mortamor vs Nightshroud (Yu-Gi-Oh! · Tier 2-C): Nightshroud · Slight edge
Mortamor vs One Being (Mortal Kombat · Tier 2-C): One Being · Slight edge
Mortamor vs System XX (BlazBlue · Tier 2-C): System XX · Slight edge
Mortamor vs The Great Intelligence (Doctor Who · Tier 2-C): Too close to call
Mortamor vs Mysterio (Spider-Man: Shattered Dimensions) (Marvel · Tier 2-C): Too close to call
Mortamor vs Dr. Ivo Robotnik (Sonic · Tier 2-C): Mortamor · Slight edge
Mortamor vs Hecatoncheires (Dungeons & Dragons · Tier 2-C): Mortamor · Slight edge
Mortamor vs Abo and Kado (Dragon Ball · Tier 2-C): Mortamor · Slight edge