That archaic English is painful to read. If you don't know how to use it properly, please don't use archaic English at all. There's nothing wrong with modern English. Trying to give it an archaic feel while doing it all wrong just make the character sound phony.
Ch.1: "If 't be true thee desire mine own blood then alloweth me to useth thy nameth."
thou (2nd person singular subject), not thee (2nd person singular object)
desirest (2nd person singular verb), not desire (1st person singular verb)
my, not mine (same as modern english)
allowest (2nd person singular verb), not alloweth (3rd person singular verb)
use (1st person singular verb), not useth (3rd person singular verb)
name, not nameth (name here is a noun not a verb, and it's 2nd not 3rd person)
Edit: ......On 2nd thought, maybe that's why the character keeps botching his summoning? His language is a mess...