Warp Strike – Key 1
Activated ability. Warps behind the targeted unit and performs an instant attack. Damage dealt increases as the skill increases.
Okay, Blinkstrike. Probably will have to do more damage than Lord Erebus's AoE one, so this is probably gonna be disgusting.
Deadly Warp
Passive ability. Warp Strike has a high chance to critically strike.
Oh god no.
Spine Attack – Key 2
Activated ability. Launches a barb from his tail, attacking an enemy at range. Damage dealt increases as the skill increases.
Meh. Does he need a ranged attack when he can warpstrike into the fray?
Warp Area – Ultimate – Key 3
Activated ability. For a few seconds, Demon Assassin warps to nearby enemies and attacks them. While performing this ability, he is invincible. Number of warps increases as the skill increases.
Alright, this is in DotA (blademaster). Ultimate? Fair enough I guess.
Forceful Blows
Passive Ability. Smaller enemies near targets of Warp Area are thrown into the air.
No. An "Ultimate" should not have any passives. Especially one that eliminates the primary counter to the Ultimate (having minions nearby to take the damage).
Shadow Swap – Key 4
Activated ability. Demon Assassin swaps places with an enemy Demigod. Distance increases as the skill increases.
This is Venge's Ult in DotA, for good reason. This better have very short range (not more than regular towers' sight radius, however far that is); basically the same distance as the blinking cloak thing.
Elusiveness
Demon Assassin’s chance to dodge normal attacks increases.
This better not turn into an evasion-fest like endgame DotA used to be with all the agility heroes.
Demon’s Speed
Demon Assassin’s movement speed increases.
This is absurd, because with evasion he's already going to be harder to kill than a few of the other DGs. Give him faster attack speed or something instead.