Sterling smiled to his brother, lime green eyes glittering with encouragement, though he frowned slightly as Dante refused to hold eye contact. Vaguely, he wondered if it was apparent the two were familiar with each other. The teacher didn't join the rest of the class in folding the silence, and carefully brought Chime down to his lap with a sigh. Of course he had been rude. 

"I believe that's everyone! Alright, well we have a few more hours together, and though that might not be any time for a formal lesson, why don't we go over the five basic theories of magic, alright? Can anyone first list the five first?" Excitedly, West raised his hand, bouncing impatiently. Eventually that would get old, but now it caused him to grin. "Alright, West, go ahead." 

Acting as if he had been chosen for some infinitely powerful task, he eagerly piped, "There's the Alchemy Theory, Fates Theory, Heart Theory, Contract Theory, and the Healer's Theory." Humming with approval, he nodded. "Okay, great. Anyone care to elaborate on these theories?" Klaus raised his hand halfway, smiling and letting the others see his fanged teeth. Sterling nodded to him. "The Heart theory states you cannot use any magick to manipulate someone's soul." Mildly impressed by his student's show of intelligence so far, he prodded Klaus further. "Example?" 

"If someone's in love, for example, no normal love potion would work on them," Squeezing and petting the small catlike familiar, Sterling clicked his tongue and waited for other students to volunteer. Wolfgang slowly raised his arm. "The Contract Theory firmly states that any relationship with a demon or familiar, no matter how much they appear to care," He stared ominously at Chime, "Are constantly awaiting your doom." Chuckling nervously, Sterling abruptly stopped petting Chine and withdrew his hands. 

"That's correct... However, they also swear complete loyalty to you, so if a familiar ever turns on you, they are no longer entitled to anything you promised they could have when you died." The class murmured as Sterling continued. "In addition, they can leave your leadership at any time. For this reason, all of my students are recommended to contract either a familiar that's quite weak and obedient, or one they can bond easily with." Then, more softly, added, "But the theory is correct. You can't be friends with a familiar, no matter what you feel. Anything they do for you are all means to an end, so never promise much."