Curse Manipulation (Cursed the bloodlines of 72 magus families to transform into Demon Gods after a set amount of time, even drawing him is enough to be automatically cursed),
Matter Manipulation, and
Spatial Manipulation due to being the foundation of modern magecraft itself,
Mind and
Soul Manipulation (His gaze itself tears out the mind and soul of anyone who looks directly into his eyes, sends them to Purgatory, and leaves them to rot there, and though it is less effective against Spiritual Beings like Servants, it still makes them drown in their flaws. All Servants can consume souls to replenish their magical energy, and Baal was able to fuse Heroic Spirits and Phantoms),
Precognition and
Clairvoyance (He sees through the past, present, and future all at once),
Power Nullification and
Power Mimicry (With the ten Rings of Solomon, he can negate any magecraft used by humans and then use it for himself. His Nega-Summon skill can nullify the Noble Phantasms and attacks of any Servant except for Solomon's Ars Nova),
Possession (Possessed
Solomon's corpse after his death. Demon Gods can lie dormant in magi bloodlines and become active after a set amount of time, such as with Lev Lainur),
Reality Warping (Phenex, one of the Demon Gods, was able to amplify
Scheherazade's Noble Phantasm, allowing it to make fiction into reality and create the Agartha Singularity),
Resurrection (Can resurrect himself. Phenex can resurrect itself after being killed, allowing it to persist after Goetia's death and the destruction of most of the other Demon Gods),
Time Manipulation (After collecting enough energy with Ars Almadel Salomonis, he can reverse time on a planetary scale to rebuild the Earth with
new concepts, and he should be able to manipulate time regardless, as lesser magi can do so with magecraft descended from his own system),
Time Travel (Appears to the heroes at various points throughout history and can freely travel through time. Can destroy the Earth's surface in the past, present, and future simultaneously with Ars Almadel Salomonis)