I need some help

[Lonely Ghost]

Spell For Heroes:

Assassin Gnoll:
Ultimate:
Level 1-3: 10%/15%/20% (chance to appear when you hit the enemy, not when the enemy hits you) 2 clones appear, one on the left and one on the right. hit the same enemy that I hit, for 3 seconds. to give the same damage.

First Skill:
Level 1/2/3/4 To throw a poisonous cloud in an area and those standing in the poisonous cloud should miss 20%. lasts 8/10/12/14 seconds (Area of effect 500)

Item rifle:

10% to push back the enemy 300 range behind.

 

[Pyrogasm]

First Skill:
Level 1/2/3/4 To throw a poisonous cloud in an area and those standing in the poisonous cloud should miss 20%. lasts 8/10/12/14 seconds (Area of effect 500)

The default skill Cloud does exactly this. Look at its data fields.

 

[Footman16]

I think Silence also has the ability to add a percentage miss chance in an AoE.

For the ultimate if you have Reforged, there's a trigger action to detect when your unit hits another.

For the push back, you'll need a knockback system (there's plenty in the spells section) then create a dummy passive (bash for example) with the proc chance you want and then when that passive procs you apply the knockback effect.