LOL shit happens, exactly xD, just ask AP Shaco ultimates when enemies think they're about to get a kill and BAM, life just happened!
Anyways though, with the Fizz idea:
"ACTIVE: Fizz hops onto his trident in a nearby location, becoming untargetable for 0.75 seconds and gaining the ability to use Trickster for no additional cost before the effect ends."
Nowhere does it say anything about being invulnerable, Kouga... :/
Why does Master Yi get the short end of this stick. Yes i understand DoT's will work and what not, but NO champion should be affected by any AoE spell during a time of being 'untargetable' i guess the question to ask here is what does untargetable mean? Since there is no clear definition in Webster's dictionary, implying it's a pseudo-word made up by Riot, one may ask is it either A.) The champion is not able to be targeted by targetable spells like let's say a Vayne condemn or Teemo's blinding shot or B.) The Champion is simply immune to being damaged by any targetable spell, obviously it can't be B because ignite and Dot's effect the champion during periods of 'untargetable'. We're in a catch22 here...
I think that this whole idea can easily get complicated, which is where it's going right now. All i ask is that riot simply allows Master Yi to dodge Lissandra's snare and like spells. I hate being hit by Sej's knock up even though i JUST pressed my Alpha Strike.. it just makes no logical sense, because Fizz isn't affected by these spells during his 'untargetable' phase as well. It would only be fair :P