its level increases as u level up
and at level 70, the bonus is a whole +150%
it increases the damage of ur basic,jump,and dash attacks
thats it
...
wut, was expecting something more?
theres nothing more
oh ya, the 'basic attack damage bonus' doesnt apply to basic attack in frenzy mode
but it applies to sst...zerkers are missing out on a whole 150% damage bonus at max when u do frenzy...