cant kill first boss

[Biscut]

Hey guys im new here. I cant kill the first boss in tutorial. I get his health about halfway then it regens. I spent about 15 min just attacking. Am i missing something please help.

[thebane]

try playing in multiplayer maybe? yea kreigberg is really hard

[Bastilia]

Use blood pack to kill it!

[thebane]

Oh misread that yea use a bloodpack

[Kraoracha]

Or is it maybe you dont hold the attack button to get more power to kill him?