Rewards (2).

Seeing that Cain was lost in thought, Azazel simply shook his head,

"Do not think about it too much. Face the problems you are facing now head-on." 

'Oi, oi... Why the hell is he being so nice? Does he want to try killing me again?' Cain was incredibly suspicious of Azazel's drastic change in behavior. While it wasn't very obvious, it was significant enough for it to send chills down his spine.

Taking a deep breath, Cain let his thoughts settle down. If Azazel wanted to do anything to him, he wouldn't have to go about it covertly or make it complicated due to the sheer difference in power between them.

He quickly moved on to the next category, mana shards or cores...

Despite mana cores being more powerful than mana shards, Cain would be unable to use them, as they contained too much power for him to use. However, if he took a mana shard, it would just end up being a waste. After all, he had a multitude of mana shards at his disposal.