[i]That certain Astartes dashed out of the way, hitting the blade from the top with his Bolter in the process, knocking it to the ground. Then, he charged the now unarmed Heretic, swinging downwards with his Chainsword while swinging at the Heretic's head with his Bolter from the right side, intent on bashing someone's helmet it. [/i]

All according to plan. In order for the Templar to dodge the sword, he had to focus on it, and that moment of concentration was more than enough time for Leonidas to execute his final assault. Before the Templar could recover from dodging the sword, Leonidas slammed him against the wall. Leonidas' hands were glowing an eerie orange, as were the lenses of his helmet. In a yell of rage, Leonidas grabbed the Chainsword Arm, and ripped it out with ease! He took it in his hand, driving it into the Templar's right shoulder. It wouldn't kill him, but he couldn't get off the wall without ripping out the Chainsword. Leonidas sighed and picked up his sword, sheathing it. "I didn't want it to be like this." He walked away, his Berzerker friend picking up his KHORNE FLAKES, and his Turtle climbing on top of his helmet. They left the Templar, broken and beaten.

[i]The entire arm was made out of adamantium and ceramic, same with the parts that connected it to his chest. On top of that, he was also wearing armour up to the elbow on his Chainsword arm, all in all making tearing it off very hard. While the Heretic was yanking on his arm, the Astartes grabbed his own Bolter, and rammed the bayonet into the Heretic's throat, ramming the knife straight through the throat guard. He then twisted and moved the knife, making the wound absolutely gigantic, eventually decapitating the foul Heretic completely - though his arm was severely damaged. [/i]

Leonidas was a Psyker, and what he just did, was because he's a Psyker. It's called Maelleus Hammerhead, this makes his hands have the power to crush Adamantium and punch holes through Dreadnaughts. He ripped the arm off without trouble and impaled your shoulder. Even if he didn't rip it off and you attempted jamming your Bolter into his neck, his Errant Armor was made SPECIFICALLY to prevent that from happening with an Adamantium neck guard. No.

Well I didn't know that so rip. But can you like, at least kill him? I wanted to have him killed off.

The more you know. Anyway, Leonidas wouldn't be himself if he killed an Astartes without good reason. I mean, you were just doing your job. So, I'll just leave you there. But you could like, commit seppuku or get killed by a Daemon.

Nah, I guess I'll drag my ass back to the General Quarters and hopefully get patched up or some shit.