Narillasanz is immune to fire, fear and stun, has over 12,000 hp and hits for 300-400 with a regular attack. This is not a mob which can be taken down solo easily by any player of comparable level, and indeed can give trouble to characters 10 or even 15 levels above if unprepared. Strategies for classes who don't have pets (or who aren't able to keep up healing on said pets) including kiting Narillasanz to Tarren Mill (for Horde). For such a tough mob Narillasanz's drops are nothing special; expect 6-10 silver and a random Uncommon item.
Flame Breath (Fire) - Inflicts 10 Fire damage to enemies in a cone in front of the caster.
Renew (Holy) - Heals an ally every 3 sec. for 20 sec.