Normally it's a magical bond. The Master maintains the Servant's existence by providing them with mana, and the Servant fights for the Master and obeys them. As proof, the Master gains access to three Command Spells, each allowing them to give the Servant an absolute command.
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
no subject
Does that satisfy you?
no subject
...Well. I appreciate Ruler in a lot of ways, but as a Master he's not ideal.
no subject
no subject
[shrugs, like he's not quite sure how to put it into words]
no subject
no subject
no subject
no subject
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)
(no subject)