Ok here it is, if its not a bug then this is a very bad thing. I was playing as VLad vs a fiddle mid. The bug is when fiddle cast his drainlife on me vlad, even if turn into my bloodpool the link is not canceled and continue to drain me life when I am in my pool.
And if it is not a bug, PLEASE, Sanguine Pool is a self-targeted point blank area of effect ability that turns Vladimir into a pool of blood for 2 seconds, making him untargetable for the duration.
Fiddlesticks drain is treated as a DoT which continues to apply damage while channeled. Abilities which make the user untargettable (such as Fizz E, Vlad W, or Elise E) do not stop these abilities from dealing damage when they have been applied before the used becomes untargettable.
From the league wiki page for Vladimir:
Vladimir is still affected by damage over time effects (like Ignite and Swain's Torment) that were applied before going into Sanguine Pool.
From the league wiki page for Fiddlesticks:
Drain will continue channeling even if the target becomes untargetable through abilities such as Fizz's Playful and Vladimir's Sanguine Pool, as long as they remain within range of Fiddlesticks.
Hm, I'm not sure if it is a bug.
making him untargetable for the duration - Fiddle isn't targeting him at this point, he's already got him locked. My assumption would be target is only the primary connection. I wonder, is it the same with Morgana? I would assume her ult would keep the chain in the same way once Vlad pools.
I think “Untargetable" just means they cannot select you, as you are not "Invulnerable", he can still hurt you. Just guessing
If he targets you before the pool starts what's the problem
Vladimir's sanguine pool only makes him untargetable, not briefly invincible. It is not a 
Think of it more like he is briefly pulled below ground while it is active. You may already know this but same thing with ignite, if you ignite a 
with 10 hp and he Pools, the ignite DoT will still kill him in the pool.
working as intended
So how does a garen E work in this. i just played a game and was being hit by both malzahar and garen and was once killed by it while in sanguine pool. I know fizz cant be hit by these abilities while in trickster. curious about the workings of those aoe's
