Kunai reskin or
PROSS:
Deathmark on 13 sec on hit
+ 50 HP on backstab
CONS
- 25 max HP

-Disguising costs 75% cloak
-No backstabs
+Disguise not lost on knife slash
+Knife curses opponent on hit meaning they will take crits from all sources for 8 seconds

+ On Backstab: Marks Player for Death, Slows them Down and 5 seconds on Bleed
+ No limit to amount of players affected
+ Disguise Not Lost on Backstab

- 25% Slower Swing Speed
- 15% Damage Vulnerability on Wearer
- Backstab doesn't insta-kill

The Femur Breaker
____________________________________________________________________
Positives
+ on kill After enemy's Killed once they re-spawn their speed is reduced by 50% for 6 seconds
+On kill Players speed increased By 40% for 2 seconds
____________________________________________
Negatives
- 75 Health on wearer
- 20% Speed on wearer

On-hit: Marked for death on target
On-Backstab: everyone around the back-stabbed target is marked for death

Con:
Marked for Death while it is deployed


Risk/Reward baked into the design without feeling redundant or outclassed by other knives

why i can t use

+when you die the enemy that killed you gets marked for death for 5 seconds (dead ringer deaths also does the marked for death)
-you have 90 hp now

The Femur Breaker
Level 10 Sharpened Runic Bone

+110% Movement Speed
+Femur Break meter that fully fills after 3 kills increasing your movement speed by +135% and giving you crits for 6 Seconds
-Marked for death in femur break mode
-25% Less invisibility meter

=Shortened Femur Breaker sound effect when enemy gets killed

The Femur Breaker
Level 20 Sharpen Bone
Slot: Melee

Alt fire: can be thrown at enemies
+ Hitting their backs count as a backstab
+ On Hit: slows the enemy for 10 seconds
+ On Kill: your knife regenerate instantly
- When thrown: you lose your knife
- Can't be picked up
+ Has random crits

I just realized that most spy already has 90% of knife stats that are beneficial so how about we give him something more... niche