Probably The Old Man With The Canaries.
The Old Man with the Canaries Level 36 Solo Soldier (Leader) Medium immortal humanoidXP —Initiative +24 Senses Perception +32
HP 1,645; Bloodied 822; see also discorporation
AC 52; Fortitude 47, Reflex 45, Will 47
Resist 20 cold, 20 fire
Saving Throws +5; whenever an attack causes an effect on Bahamut that a save can end, he immediately makes a saving throw. Bahamut also makes saving throws at the end of his turn as normal.
Speed 8, teleport 5
Action Points 2 Unarmed Attack (standard; at-will) Weapon+41 vs. AC; 1d12 + 20 damage, and the target is dazed until the end of its next turn. Gold Dragon Rescue (standard; uses one canary)Area burst 1 within 30, centered on ally; +41 vs. AC; the target is stunned (save ends). Effect: The ally in the origin square gains fly 10 until the end of its next turn. Summon Gold Dragon (standard; uses one canary) SummoningRanged 20; Bahamut summons a Large gold dragon in an unoccupied space within range. The dragon has speed 8, fly 10 (hover) and, unlike a typical summoned creature, has its own defenses and hit points (all defenses 34; hp 120).
Minor Action: +27 vs. AC; 1d12 + 10 damage.
Opportunity Attack: +27 vs. AC; 1d12 + 10 damage.Bahamut’s Blessing (standard; at-will)Ranged 30; two targets; each target gains a +10 bonus to attack rolls, a +10 bonus to skill checks, and a +10 bonus to damage rolls.Bahamut’s Cleansing (minor; at-will)Ranged 30; two targets; each target can end one effect a save can end.Bahamut’s Mercy (minor; at-will) HealingRanged 30; two targets; each target can spend a healing surge and regain an additional 25 hit points.Bahamut Runs Rampant (standard; encounter) PolymorphBahamut assumes his draconic form (described below).Seven Canaries Bahamut has seven trained canaries, which he can transform into gold dragons. Some of his powers use up these canaries. All the canaries return during a short rest.Discorporation (when bloodied)When Bahamut becomes bloodied, he discorporates and is unable to take physical form for a time.Alignment Lawful goodLanguages SupernalSkills Arcana +31, Athletics +33, Diplomacy +32, Endurance +34, Heal +32, History +31, Insight +32, Intimidate +32, Religion +31Str 31 (+28) Dex 23 (+24)Wis 28 (+27)Con 33 (+29)Int 27 (+26)Cha 29 (+27)Equipment robe