ability buff - increase damage of unit

[isaax190]

is there any ability that i can increase the damage in which i dont need to use triggers...
if not can anyone help me make one...
its an item ability...
if i click it, it will instantly increase its damage...
then if i click it again the buff is removed...

 

[vypur85]

Defend? It doesn't has buff though. And damage increment doesn't show up.

Edit:
Damage Dealt (%)

 

[Vassilev]

i didnt know defend could do that

 

[jhnam95]

Roar... Make the AoE like 1.

 

[Vassilev]

>>>Roar... Make the AoE like 1.

Roar has a buff , buffs can be dispelled.

And he wants to be able to remove that buff, without triggering.