Lyon

Fire Emblem · Games · Human, Prince of Grado, Vessel of the Demon King

Base

Tier: HIGH 8-C
Attack Potency: Large Building Level
Speed: Superhuman, up to Massively Hypersonic
Durability: Large Building Level

With the Dark Stone

Tier: 6-B
Attack Potency: Country Level+
Speed: Superhuman, up to Massively Hypersonic
Durability: Country Level+

Powers and abilities

Superhuman Physical Characteristics
Weapon Mastery (Of Tomes)
Accelerated Development (Training/Battle/Leveling; Physical Statistics, Magic, Skill, Luck, Magic Resistance)
Damage Boost (Can deal critical hits, which do triple damage)
Non-Physical Interaction
Incorporeals (Can harm Phantoms)
Magic, and Durability Negation (Magic completely bypasses physical defenses such as armor, or thick hides)
Darkness Manipulation (Is a user of Dark Magic)
Precognition (Capable of predicting future events by reading "ripples" from the future; with the greater the disaster, the easier it is to read said ripples)
Healing (Low-Mid. With a small sliver of the Sacred Stone's power, was able to heal a girl who's burn injuries were so severe that even healing staves couldn't heal her, despite Healing in Fire Emblem being shown to be able to heal injuries such as stab wounds through the torso)
Life Absorption (via Nosferatu)
Fire Manipulation (via Fenrir)
Electricity Manipulation (via Naglfar)
Supernatural Willpower (Lyon was able to resist Fomortiis' possession in Ephraim's route, which requires a strength of will beyond that of normal humans. Even in Eirika's route when we was possessed, his soul was able to resurface several times, despite it being stated numerous times to have been devoured whole)
Magic (via the Resistance stat. Magic users are attuned with it's flow, granting them a high resistance to magic)
Disease Manipulation, and Poison Manipulation (Can stand in the Darkling Woods, which has been flooded with disease and venom, corrupting the once pristine forest. Can survive, and automatically recover from the venom of an Elder Bael, which has been described as being lethal)
Corrosion Inducement (Can withstand the putrid breath of Necrodragons, which decays all that it touches)
Extreme Heat (Unfazed by the temperatures of Mt. Neleras, a volcanic valley filled with lava pools)
Possession (Was able to resist Fomortiis' possession in Ephraim's route. However, he was not able to stave off his influence. Even in Eirika's route when we was possessed, he was able to fight back against the Demon King's control)
Unconventional Resistance to Soul Manipulation (Characters in Fire Emblem can consistently survive without their souls, albeit while being reduced to a husk personality wise)
Weapon Mastery (Of Magic Staves)
Teleportation (Capable of teleporting)
Necromancy (Brought back Morva as a Necrodragon after killing him)
Summoning (Can summon phantoms that fight for him)
Flight (Phantoms are capable of flying over terrain, much like other Flying Units)
Incorporeality (For the Phantoms)
Paralysis Inducement (Froze Ephraim in place)

Weaknesses

Easily manipulated, and emotional, with Ephraim stating that fighting is not in him.

Ranked tied for #11 of 160 in Fire Emblem by strength.

Close fights from other series

Lyon vs Firestorm (Pre-Crisis) (DC · Tier HIGH 6-B): Lyon · Slight edge
Lyon vs Miao Ying (Warhammer Fantasy · Tier HIGH 6-B): Lyon · Slight edge
Lyon vs Cho (Invincible · Tier HIGH 6-B): Lyon · Slight edge
Lyon vs Battle Axe (Godzilla · Tier 6-B): Too close to call
Lyon vs Conrad Leto (Black Clover · Tier 6-B): Conrad Leto · Slight edge
Lyon vs Raven Beak (Metroid · Tier 6-B): Raven Beak · Slight edge
Lyon vs Chōchō Akimichi (Naruto · Tier 6-B): Too close to call
Lyon vs Lisa Yadōmaru (Bleach · Tier 6-B): Lisa Yadōmaru · Slight edge

Compare Lyon with another character · Lyon on the VS Battles Wiki