Talk:Master Yi/@comment-175.114.56.101-20110308062946/@comment-1973463-20110322041129

Thornmail gives a lot of armor, and it reflects back damage done before armor reduction, so with enough armor on the target, Yi can be doing more damage to himself than to his target. The feedback damage is mitigated by MR, though. A Yi with 80 MR (merc treads, lv 18) and 51|40% armor pen (max armor pen from runes and masteries, last whisper, and ghostblade or stark's aura) vs a target with 20|15% magic pen (mastery and sorc shoes or abyssal scepter aura) and 180 armor (thornmail, lv 18) takes 36% of the damage he does to his target as feedback damage. so he'd need 36% lifesteal to negate the feedback damage. Add a Banshee's Veil to up his MR to 130, and he only needs 28% lifesteal to do it. However, remove the Last Whisper (but keep the Banshee's Veil), and it's back up to 36.5% lifesteal needed to keep up. Basically, Yi needs MR, armor pen, and lifesteal (or just a ton of lifesteal) just to mitigate thornmail's damage. That's gonna cost him a lot more than the guy who bought the thornmail paid. Also, for lulz: A noob Yi with 54 MR (lv 18 and no MR items) and just 31|0% armor pen (max armor pen from runes/masteries and none from items) vs the same dude, 20|15% mpen and 180 armor, takes 58% feedback damage. It's always fun going against any autoattacker with no MR or armor pen and watching them melt themselves. Especially as Annie or Rammus since they have armor and feedback damage built in to stack with that thornmail.