Talk:Saryn/@comment-2A02:C7D:904:E00:8996:9D17:2AA4:E620-20181213005553/@comment-2003:DF:8725:8800:DD40:9044:FDE8:3F5B-20190104045227

You cannot level up weapons with any kind of kill mechanism of a warframe's ability, since the affinity gain only gets counted towards Saryn (in this example) if she kills the enemy with Spore/Miasma. Toxic Lash is another story, since you actively need to kill stuff with your melee, thus not counting as a Ability-Kill (since it doesn't even kill, it just buffs damage of your melee).

Casting an ability will share the affinity amongst all equiped items, but that amount is ridiculously low and not worth even a single penny.

The only time where it was working properly (but people getting banned for abusing game glitches for ridiculously fast leveling, thus violating ToS) was the Khora kavat spawn bug, which got fixed.

The thing you might have seen might be something which you have imagined and does not exist at all. There is and will be no way ranking up your weapons with Warframe abilities killing stuff.