Lux, Taric, Karthus: Kartarux
Passive: After casting an ability Kartarux marks all affected enemies with light energy for 6 seconds. The next basic attack consumes the mark, dealing 20% armor, 20% ability power, and 18-154 extra magic damage, based on level. Kartarux also reduces the cooldown of the abilities with 2 seconds on each basic attack. Upon taking fatal damage, Kartarux remains active for 7 more seconds, losing the ability to move and use basic attacks but becoming untargetable and invulnerable for the duration, as well as able to use abilities at no cost.
Q: Kartarux releases a sphere of light in a line that deals magic damage to the first two enemies hit and roots them for 2 seconds. When a target gets rooted, Kartarux detonates the target area after a 0.5-second delay, dealing magic damage to all enemies within. This damage is doubled if the detonation hits only a single target. During this, Kartharux also heals himself.
W: Aura: Kartarux and nearby allies gain bonus armor equal to 12% of Kartarux's armor. Passive: While W is not on cooldown, Kartarux gains bonus armor. Active: Kartarux shatters his gemstones, dealing magic damage to all nearby enemies and reducing their armor for 4 seconds. Kartarux throws out his wand in a line, shielding himself and allied champions in its path for 3 seconds. Kartharux's wand then returns to him, reapplying the shield to all allied champions it passes through and himself. This refreshes the original shield, but does not stack with it. Kartarux creates a wall at the target location for 5 seconds that provides sight around it for the duration, slowing enemies who pass through it by an amount that is reduced after 1 second and that decays over 4 seconds and reducing their magic resistance by 15% for the duration.
E: Kartarux fires a prismatic sphere at the target enemy which stuns them and deals them magic damage, which increases with the target's proximity to him. Kartarux sends an anomaly of twisted light to the target area, slowing nearby enemies and granting sight of the area around it for up to 5 seconds. Kartarux deals magic damage to all nearby enemies each second.
R: Kartarux deals magic damage to all nearby enemies. For the next 10 seconds, he also gains bonus attack damage and ability power, while also generating an aura that grants half of those bonuses to nearby allied champions. After gathering energy for 0.5 seconds, Kartarux fires a giant laser in a line that deals magic damage to all enemies hit and briefly reveals them and the surrounding area. Kartarux channels for 3 seconds and, upon completing the channel, deals magic damage to all enemy champions.