Syndra W dealt dmg meanwhile the "grab" animation or simply before it landed

So i'm just playing this normal game, where after i used both Q and E and just on to do W suddenly Draven dies when the "Grab" animation plays itself and suddenly i'm like"grab another sphere out of dravens body, thus killed it" . I know he had the Bleed sword, still after he got dmg-ed from 860 to 247 so the bleed is about 613*0,3~181,3 that wouldn't one shot him even as i know it bleeds over 3 sec so around 60 dmg/sec. I can't see any auto attack or any kind of other spell there, maybe sejuanis sunfire could dmg him for about 20-30 dmg ,but that still doesn't make any sense at all. Oh and since my mouse was over Draven the sphere next to the turret ruins was a lot closer still my champ picked the sphere behind me, why? If let's say the other guys did "something" to kill him, why did i get the kill in the end? Hope you can see what i could.

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