Originally Posted by PoopSlapped
It says it has a 3 second cooldown for the mana gain ability... It might show the 3 second cooldown on the item, but if you spam all spells IE Sona Q,W,E back to back... it will give you all 3 spell cast of mana gain.
So instead of it proccing once, it will proc 3 times even knowing its with in 3 seconds.
Then if you build another Tear, it will give you the current mana you have gained onto your first one, instead of making you start over...
Intended. It shows the tooltip on both items, but giving you the mana only once due to sharing the same ability name. When you build it into a bigger item and it upgrades to Muramana or whatever, THEN the count resets.
I think, to your first point, that the cooldown only counts for individual skills, for the sake of cases such as Karthus' Q, etc. but I could be wrong.