The stacking bonus attack speed can be tracked on the HUD via a buff called Zeal, while the maximum stacks bonus grants the buff Exalted.
Subsequent applications will also refresh the duration of all stacks, but all of them are lost when expired.
If Kayle is in her attack animation after the stacks expire, she gains another 0.5 seconds to refresh/stack Zeal.
Basic attacks within 175 units will still use Kayle's melee basic attack animations and do not utilize projectiles.
They are still classified as ranged attacks.
Due to this fact, projectile-blocking effects cannot intercept basic attacks while Kayle's target is within her "melee" range.
On becoming Aflame, Kayle's bonus size grows linearly over 1 second.
Basic attacks against structures do not trigger fire waves.
While at 4 stacks of Zeal, the next attack on-attack reaching the fifth stack will be empowered by Aflame, releasing the first fire wave.
The Zeal and Exalted buffs are replaced by a new buff that grants the benefits of both and it is not visible on Kayle's HUD.
A wave consists of three projectiles for the hitbox and a fourth for visuals.
The hitbox projectiles spawn 75 units behind Kayle, travel through her, and are destroyed once they've traveled 850 units. Their technical details are:
Range: 850 (755 effective)
Width: 200
Projectile Speed: 2800
Angle: 18 (left and right at 9 to their side, respectively)
The distance of the fire waves scales with bonus attack range.
Projectile-blocking effects can block each projectile individually.
It is possible to block the visuals, but still get hit by an unblocked "invisible" hitbox projectile.
Hitting an enemy with multiple projectiles of the same wave will not increase the damage dealt.
The fire wave shares cast instance with the triggering basic attack.
The amount of Conqueror stacks gained will be 2 (melee) / 1 (ranged) if the basic attack deals damage first or 2 if the wave does so.
Keep in mind that it's still two damage instances. If one triggers Bone Plating, the other's damage will be blocked.
Fire waves roll critical strike chance on each target hit individually.
A known issue is that despite dealing area spell damage the fire wave does not:
Trigger Manaflow Band.
Because Kayle is both a melee and ranged champion, she can purchase both ranged and melee exclusive items at anytime, but their effects will function depending on her current range type; the same principle also applies to runes.
However, keep in mind that, prior to ascending to Arisen, also changes this behaviour based on its usage.
Waves are fired in the direction that Kayle is facing. Changing that during the attack windup via Flash will also change the direction of the wave.
Each ascension has an unique animation and a voice line. (See: Kayle's quotes)
The ascensions' animation will override the current one, but it does not cancel Kayle's current action, nor her previous orders.