Can anybody explains me how the power bash works?
is it just to press left mouse while blocking? isnt that available without the perk? Oo

hold it down when blocking, you'll know it when you do it... It's really good, albeit stamina draining.

i tried it out... pressed left mouse while time was slower... recognized no different to normal bashing that i do instead -.-

Hold block and press attack and you bash with the shield. Hold block and then hold attack and he swings the shield... Like power attack with the shield raised...

ahhh ok, this work with 2h??

and what if a am bashing while time slows? is there any special about that? except of interrupt enemy in most times.

Marguth, you can't shield bash with 2h, because... umm... I don't know how to tell you this... you can't use a shield and a 2h weapon.

If you press right mouse button while wielding a two handed weapon - you will block
If you fast tap left mouse button while you block - you will bash your opponent.
If you hold left mouse button while you block - you will power bash your opponent.

Pro tip. Press ESC and klick on HELP. This will open up the in-game help menu. LOTS of good reading and even tactics how to use different skills such as Block.