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You need to be careful when dealing with increasing damage taken. The only spell that does it currently is Vladimir's ultimate, and that is 12% for 5 seconds, (5x12 is 60) and yours is 20% for 4 seconds (4x20 is 80) and not a skillshot and not on a long cooldown.

Compared to Nunu's ultimate, your channel time is too long and you offer no means to keep people in the effect (nunu's slows by a large amount) and the reward is weak and easily countered. People will easily walk out of this, not take much damage, and then your finishing effect won't deal much because they haven't lost enough health.

I like the Champion's name, kinda reminds me of WoW: WotLK. In that Gundrak place with all those spiders.

Nice Concept though I'd like to see his original appearance.

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I'd suggest adding a war story to the lore.

Not an actual "Noxus vs. Ionia" war story, but a story of something that he's done.

What you have is good, seeing as it's just dripping (pun intended) with adjectives, but you don't have much.

You say he was restrained for safety. Being Zaun and all that, he must have done something reeeally mass-murder-y. Add a story about it with the same level of detail you've used so far, and you've got something.

With the ult, I agree with Zarkof, it's just not scary. I'd also agree that maybe you should add something along the lines of compounding damage while his ult is up. (first second = .8% second second = 1% third = 1.2% etc.)

also, tinny doesn't need a hyphen.

There's a lot of potential here if you're willing to keep going with it.

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