My namesake started with the MMORPG Shadowbane, as an Irekei Mage-Assassin.
Being an MP system calls for psionics, but there are a fair number of long-duration buffs or single use casts that scream wizard.
The race calls for something desert related, with ties to dragons.
Race: Desert Kobold, Dragonblood Desert Human, Asherati, etc
Classes: Psion/Wizard/Cerebremancer
Shadowbane Skills / DnD Spells, Feats
Mage Armor / Mage Armor + Stoneskin
Reflection / Fire Shield
Poison Dagger / Poison Use Feat, Creation
Blind / Glitterdust
Steal Breath / Spell Matrix: Poison + Entangle
Sneak Attack (opener) / Spell Storing Dagger (vampiric)
Passwall / Dimension Door, Teleport
Sneak / Invisibility Spell
Silence / Silence Spell
Bloodfire / Not sure, some fire DoT
Shadowmantle / Some sort of healing, positive energy block, curse
River of Life / Body Adjustment
Shadowbolt / Energy Stun (cold)
Nunkuruji prefers to hunt solo marks, studying his opponents before striking at the most opportune moment.
The assassin strikes first with spell-storing poisoned daggers in order to cripple his opponent, and then unleashes a spell matrix of debilitating effects to keep his mark as weak as possible. If the target has the potential to heal itself, a shadowmantle effect is used as well. He finishes off his opponent with a barrage of energy stuns in order to keep his target locked down.
There are, of course, better ways to assassinate people in DnD, with all the fun SODs. This simply mirrors the style of play used by the original character.