Matteus is not a paladin - his magic is not holy, though he will say that it is.

Matteus's magic is a twisted, warped version of the spells he could cast when a warrior of the holier orders:

Detect Evil (by perspective); at will - Matteus can no longer differentiate between right and wrong easily, and therefor makes his own damn decisions about what is right and what is wrong. His detect evil spell will detect evil in whatever he believes to be evil, and therefor justify him in obliterating it.

Righteous Bolt (was Holy Bolt); 1 round - Matteus blasts a discharge of silvery-grey magical energy from his palm, and it his fueled by the power of his commitment to whatever his cause may be, as opposed to his holy power, what it once was. The bolt may change color depending on his mental state, but the effect is the same - concussive force and electrical power. This spell can be discharged through his sword.

Flames of Judgement; 2 rounds - A column of fire is blasted around Matteus's target, lasting only a few seconds. Matteus can only use this spell against those whom he has used a reasonable - by Matteus's reasoning - thought process to determine guilty of some sort of crime.

More to come, but noted that the flames are his most powerful spell, so nothing too crazy has been left out.