I try to make an ability wich give the hero 1+ attribute point each time its used (it cost 1 lumber) but i cant find any ability wich you can mass cast.
If you have to wait 2 seconds between you can cast it, you have to wait 20 seconds to start play again.
This is probably because the unit's backswing time is above 0. Backswing is how long it must wait after it casts a spell, etc. Its one of the first values for a unit in unit editor.