The user and their clone both cannot trigger Nightstalker from a single takedown. The clone will only trigger Nightstalker by itself if it scored the killing blow.
Nightstalker will not activate from scoring a takedown on a clone.
If the user activates Nightstalker's stealth while already invisible, they can be seen again after Nightstalker's stealth ends despite their own invisibility being active.(note)
Nightstalker's stealth will end prematurely if the user activates a stealth effect of their own during it.
If the user is camouflaged when Nightstalker's stealth activates, they will still be visible in their camouflage's detection radius despite also being invisible.(note)
On release, Duskblade of Draktharr used to apply a mark via basic attack and after a few seconds, would detonate to deal damage based on missing health in addition to its base damage. This was strikingly similar to Zed'sDeath Mark.
Unique Passive - Nighstalker: Basic attacking an enemy champion deals 100 (+ 30% bonus AD)bonus physical damage on-hit and slows them by 99% for 0.25 seconds (15 second cooldown). Champion takedowns within 3 seconds reset this effect's cooldown and grant you invisibility for 1.5 seconds.
Mythic Passive: Empowers your other Legendary items with 5 ability haste.
Unique Passive - Nightstalker: After being not visible to enemies for at least 1 second, your next basic attack against an enemy champion deals 30 − 150 (based on level)bonus physical damage on-hit and, after a 0.25-second delay, slows them by 99% for 0.5 seconds. The enhanced attack lasts 5 seconds after being seen by an enemy champion.
Limits:Ranged basic attacks do not apply the slow.
Removed Unique Passive - Blackout: When spotted by an enemy ward or traps, gain Blackout over a 400-unit radius for 8 seconds (90 second cooldown). You disable surrounding wards, as well as exposingstealthed wards and traps. The effects linger for 2 seconds after you walk away. Melee basic attacks instantly kill wards or traps revealed by Blackout. Blackout does not extend over terrain.
No longer grants armor penetration and movement speed.
Nightfall passives removed.
New Unique passive: +15 Lethality.
New Unique passive: +20 movement speed out of combat.
New Unique passive: Nightstalker - After being unseen for at least 1 second, your next basic attack deals 50 + (200% Lethality) bonus true damage on-hit (lasts 4 seconds after being seen by an enemy champion).
New Unique passive: Blackout - When spotted by an enemy ward, causes a blackout for 8 seconds, disabling all nearby wards (90 second cooldown).