Re: [Str][Scourge] Floortrellen
First three skills are rather typical and common. Plus a few things are missing like razor leaf's AOE or Demonic Blast's duration. Ultimate is too strong plus the bonuses aren't even stated.
Anyways, time for review.
1st skill : Basically any other old slowing nuke but with poison damage. It's overpowered, try comparing to venomous gale. Constant 25% slow, faster DPS, double initial strike damage, lower mana cost and cooldown.
2nd skill : For 160 mana, deals 520 damage and stuns for a sum of 4 seconds every 15 seconds. Lovely.
3rd skill : Compare this to null field. Extra 5% magical resistance and HP regen. Only thing is AOE is smaller, but it's a rather boring skill to begin with. Only adds up to survivability in the simplest manner, nothing special.
Ultimate : 12 minions that lasts 30 seconds, with steroids, resist magical damage and a whopping 70 damage. That's like increased 840 damage to your DPS. Lovely.
Too overpowered and also rather typical skills. Needs a few tweaking and also perhaps rework the 3rd skill into something cooler. Current one's concept is fine for survivability, but there's better ideas you can come up with...for one the name doesn't even fit the concept (when I think of rotten armor, I think of some debuff effect applied when attacked physically, well of course that would be rather Viper-ish but you could tweak it around to make it cool at the same time simple)
PS. If ever any of my words seem offensive, take note that I'm pointing a few things out, no offense in any manner. Sorry if my review makes you feel uneasy in any way, cheers!
PS#2. Suggestion for your next idea : Walltrellen.