After using an ability, Lucian's next basic attack within 3 seconds will shoot twice. The second shot deals physical damage equal to 30 / 40 / 50% of Lucian's AD (100% damage against minions and monsters), but fully applies on-hit effects and can critically strike. If the target is killed before the second shot can go off, the second shot will automatically shoot at something else.
Lightslinger is both an on-attack effect and an on-cast effect that allows Lucian to strike two autoattacks in quick succession after each ability cast.
The first attack, respectively, functions as the trigger of Lightslinger and will consume the empowerment.
If the target dies to the first hit of Lightslinger, the second shot will target another nearby enemy unit. This will prioritise enemy champions, and minions with low health.
Even if no second target is found, the Lightslinger buff is still consumed.
The second shot can target enemies that are hidden in the fog of war or a bush.
This action was originally a bug, but was properly integrated into the ability in V3.12.
The second attack is integrated into the first attack, meaning Lucian can move freely as usual after using an auto attack and the second shot will still fire (similar to Master Yi'sDouble Strike). Lucian has special movement animations for such an attack.
COST: 50 / 55 / 60 / 65 / 70 mana
COOLDOWN: 9 / 8 / 7 / 6 / 5
Active: After a 0.35 second delay, Lucian fires a laser in the direction of the target enemy, dealing physical damage to all enemies in a 1100-unit line.
Piercing Light will attempt to lead the target if it is moving but does not adjust further during the 0.35 second cast time. As such, a unit can dodge the laser if it changes its velocity by a sufficient amount during the delay.
COST: 60 mana
COOLDOWN: 14 / 13 / 12 / 11 / 10
Active: Lucian fires a shot that explodes in a cross pattern upon hitting an enemy or reaching the end of its path, dealing magic damage and marking enemies hit for 6 seconds.
Active: Lucian starts firing shots in the target direction for 3 seconds, each shot dealing physical damage to the first enemy it hits. The number of shots fired scales with his attack speed. The Culling deals 400% damage to enemy minions.
While using The Culling, Lucian's basic attacks are disabled and he cannot activate Piercing Light or Ardent Blaze. He can, however, move freely and activate Relentless Pursuit. He also ignores unit collision for the duration.
While similar to a channel, The Culling is only interrupted by crowd control effects that inhibit attacking - namely: airborne, forced action, stun, suppression, entangle and polymorph. Silences will not interrupt it.
Interestingly, blind will also not interrupt The Culling as Blind does not actually prevent the target from declaring attacks.
Factoring only Lucian's base attack speed at levels 6, 11 and 16, he will fire a minimum of 13 / 15 / 17 shots.
An alternate formula for calculating the number of shots fired is 13 / 15 / 17 (+1 per 20.91% / 17.42% / 14.93% AS). This formula may prove more useful for calculating the efficiency of builds outside of the game where AS is presented as a % bonus rather than as attacks-per-second.
For the purposes of skills such as Backstab and Mocking Shout, Lucian is facing the direction of his movement, not the direction his model is facing.
The shots being fired alternately from Lucian's left and right guns is not just a visual effect, each alternating shot has its own collision detection, resulting in Lucian firing 2 separate but parallel lines of shots. If the target is right on the edge of the firing line, it is possible for them to be hit by only half of the shots, from one of Lucian's two guns.