unique ne small gnome humanoid 

Male gnome architect, ex-thief, and illusionist

Perception +36; low-light vision

Languages Staekhirn, Common, Draconic, Elven, Gnomish, Goblin, Halfling, Protean, Sylvan

Skills Acrobatics +36, Arcana +37, Architecture Lore +35, Deception +31, Occultism +33, Society +33, Stealth +36, Thievery +36

Str +1 Dex +6 Con +3 Int +7 Wis +2 Cha +3

Items +3 major striking dancing rapier, greater ring of maniacal devices (fireball), scroll of monstrosity form, wand of widening (7th-level prismatic spray), 3,500 gp

AC  43; Fort +29, Ref +34, Will +32

HP 375

Speed 25 feet

Melee [>] rapier +34 (deadly 3d8, disarm, finesse, magical), Damage 4d6+11 piercing

Arcane Prepared Spells DC 42, attack +38; 8th dragon form, polar ray, scintillating pattern; 7th duplicate foe, project image, spell turning; 6th feeblemind, phantasmal calamity, repulsion, true seeing; 5th cloak of colors, shadow siphon, summon dragon; 4th blink, creation, phantasmal killer, stoneskin; 3rd blindness, haste, paralyze, slow; 2nd acid arrow, create food, dispel magic, invisibility; 1st charm, color spray, mage armor, magic missile; Cantrips (8th) detect magic, light, mage hand, prestidigitation, ray of frost, shield

Illusory Copies [>>] (arcane, illusion, visual) Frequency once per day; Effect Tiadaethain calls into existence 1d4+2 illusory copies of himself, which dance around him and copy his every movement, making it almost impossible to pinpoint the true Tiadaethain. Any attack that would hit Tiadaethain has a random chance of hitting an illusory copy instead. This effect lasts for up to 1 minute or until all the copies are destroyed or Tiadaethain is incapacitated. Once a copy is hit, it's destroyed. If an attack roll fails to hit Tiadaethain's AC but doesn't critically fail, it destroys a copy but has no additional effect (even if the attack would normally have an effect on a failure). If an attack roll is a critical success and would hit a copy, the copy is destroyed and the attack roll becomes a success against Tiadaethain. Once all the copies are destroyed, this ability ends.

Sneak Attack Tiadaethain deals an additional 4d6 precision damage to flat-footed creatures.

AoE6, page 87.