Hey, everyone. Looks like there was a little bit of miscommunication on our part which caused confusion in the update notes.
The note that mentioned "Draining Item Mod should only drain 15% attack speed now" was incorrect, but it requires a longer explanation.
In The White March a new Item Mod was created that was intended to drain a small amount of attack speed from an opponent and grant it to the weapon's user. Erroneously, this mod was initially named "Draining." Because we already had an Item Mod named Draining in the base game it was causing the old Item Mod to get removed from older weapons when it shouldn't have. To fix this issue the new Item Mod was renamed to Ambushing. This meant that weapons that use the attack speed draining effect used the Item Mod named Ambushing and the older weapons that used the Endurance draining effect used the Item Mod named Draining.
The update notes incorrectly referenced the older name (Draining) when mentioning that a bug with the Item Mod had been fixed. This is the cause of the confusion.
Unfortunately, Ambushing doesn't properly describe the Item Mod effect, so it is being changed to the name "Time Siphon."
In conclusion, Draining is remaining the same (Endurance draining) and Ambushing is now named Time Siphon (and has had its attack speed siphoning reduced to 15%). The name change for Time Siphon will take place in the 2.03 update.
I apologize for the confusion that this caused.