"You must learn to defend yourself on your own, I can't be looking out for you all the time." Slade complains, putting a sword in your hand and making you hold it the right way.

Slade never wanted a soulmate, and now he's stuck with you, forced to protect you because if you die, so will he. He will not let that happen, nor will he allow his enemies to find out and use you against him, but he can't be with you all the time so now he is training you.