| Ascended Form|
|(Innate): Xerath receives 15% of his ability power as bonus armor.|
|Ascended Form is a passive ability that gives Xerath bonus armor based on his ability power.|
|(Active): Fires a long-range beam of energy in a line after a short delay, dealing magic damage to all targets hit.
Cost: 65 / 70 / 75 / 80 / 85 mana
Damage: 75 / 115 / 155 / 195 / 235 (+0.6 per ability power)
Cooldown: 7 / 6.5 / 6 / 5.5 / 5 seconds
| Arcanopulse is a linear instant skillshot. After a 0.75 second casting time Xerath fires a bolt of archaeic energy in the target direction, dealing magic damage to all enemy units hit.
| Locus of Power|
Locus of Power
|(Active): Xerath anchors himself to the ground he is standing on for up to 8 seconds, increasing the range of all his spells and granting him bonus magic penetration. Upon disabling this ability, Xerath gains 35% movement speed for 2 seconds. He can deactivate the ability at any time after 0.5 seconds of casting it.
Cooldown: 20 / 16 / 12 / 8 / 4 seconds
Bonus Magic Penetration: 16 / 22 / 28 / 34 / 40 %
| Locus of Power is a toggled self-target ability. When toggled on, Xerath gains increased casting range on his champion abilities and increased magic penetration, but losing the ability to move. This effect lasts up to 8 seconds, and the ability can be toggled off after 0.5 seconds to end the effect early.
| Mage Chains|
|(Active): Deals magic damage to an enemy and marks them with Unstable Magic for 3 seconds. The next spell Xerath strikes this enemy with in these 3 seconds will stun them for 1.5 seconds.
Cost: 70 / 75 / 80 / 85 / 90 mana
Cooldown: 12 / 11 / 10 / 9 / 8 seconds
Magic Damage: 70 / 120 / 170 / 220 / 270 (+0.8 per ability power)
| Mage Chains is a targeted ability that sends a electric charge at a target enemy unit, dealing magic damage on impact and marking them with Unstable Magic for 3 seconds. Unstable Magic is triggered if the unit is hit by one of Xerath's champion abilities, stunning the target for 1.5 seconds.
| Arcane Barrage|
|(Active): Calls down a blast of arcane energy, dealing magic damage to all enemies in an area. May be cast another two times, with no cost, within the next 12 seconds before going on cooldown.
Cost: 150 / 180 / 210 mana
Cooldown: 80 / 70 / 60 seconds
Magic Damage Per Cast: 125 / 200 / 275 (+0.6 per ability power)
Maximum Magic Damage: 375 / 600 / 825 (+1.8 per ability power)
| Arcane Barrage is a ground targeted area of effect ability that calls down a blast of energy at the target location, landing 0.5 seconds later to deal magic damage on all enemy units within. Arcane Barrage can be activated within 12 seconds from the last activation for up to 2 additional times before going on cooldown.