No he kills apostle for Griffith he want's to show hhim that he will get his revenge ^^ I think !
You mean that he is used to it, and that's it?! And that the Elemental Axe, whatever power it may have had, can't replace a sword that was Guts' only companion for almost 2 years?! Yeah I think so...
If vengeance not everything why is continuing destroying the apostles ? First isn't because of the apostles and Griffith that Casca has gone insane ?
Nope I think Guts is attached to this sword that's all !
What's the point saying :
As for the Axe, he could have used it with his 2 hands, I...
Maybe he didn't take it because he always trained whith a Two Hand sword !!! Remember while while Griffith is made Knight by the king ! Guts is training !
Moreover the DragonSlayer is a symbol of Guts rebirth ! Forged by Godo this sword is the symbol of his vengeance. Maybe also it's because...