Elder Mercury Dragon
Huge natural magical beast (dragon, shapechanger)
Level 21 Solo Lurker XP 16000

Initiative +22        Senses Perception +16; Darkvision
HP 780; Bloodied 390 ; see also bloodied breath
AC 35; Fortitude 34, Reflex 35, Will 31
Resist 25 poison
Saving Throws +5
Speed 8, fly 8 (hover), overland flight 12
Action Points 2

Bite (standard, at-will)

Reach 3; +26 vs AC; 2d6+9 damage.

Claw (standard, at-will)

Reach 3; +26 vs AC; 1d12+9 damage.

Draconic Fury (standard, at-will)

The dragon makes two claw attacks and one bite attack

Quick Snap (immediate interrupt, when an enemy moves adjacent to the dragon, at-will)

The dragon makes a bite attack against the triggering enemy. On a hit, the target also grants combat advantage to the dragon (save ends)

Breath Weapon (standard, recharge ) Poison

Close blast 5; +24 vs Fortitude; 3d8+6 poison damage, and the target takes ongoing 10 poison damage and treats the dragon as invisible (save ends both). Miss: Half damage.

Bloodied Breath (free, when first bloodied, encounter)

Breath weapon recharges, and the dragon uses it

Frightful Presence (standard, encounter) Fear

Close burst 10; targets enemies; +24 vs Will; the target is stunned until the end of the dragon’s next turn. Aftereffect: The target takes a -2 penalty to attack rolls (save ends).

Quicksilver Form (move; encounter) Polymorph

The dragon becomes a liquid wave of quicksilver and shifts 6 squares. It remains in quicksilver form until the end of its next turn. While in quicksilver form, the dragon can’t attack or fly, but it gains a climb speed of 6, ignores difficult terrain, and doesn’t provoke opportunity attacks. It can squeeze through any aperture a Tiny creature could fit through. The dragon can return to its normal form as a free action on its turn. When it returns to normal, each creature within 2 squares grants combat advantage to the dragon until the end of the dragon’s next turn. Sustain Minor: The quicksilver form persists.

Change Shape (minor; at-will) Polymorph

The dragon can alter its physical form to appear as any Medium or Large humanoid, including a unique individual (see “Change Shape,” MM2 216).

Combat Advantage

The dragon deals 3d6 extra damage against a target granting combat advantage to it.

Alignment Unaligned        Languages Common, Draconic
Skills Acrobatics +23, Bluff +21, Stealth +23
Str 21 (+15)      Dex 26 (+18)      Wis 13 (+11)
Con 19 (+14)      Int 13 (+11)      Cha 22 (+16)

Description: SKILLED SCOUTS, EMISSARIES, AND ASSASSINS, mercury dragons are capable of shapechanging tricks that other dragons can’t match. The breath of a mercury dragon poisons the body and the mind, rendering its victims unable to see the mercury dragon escape or circle around for a killing blow. A mercury dragon craves variety and new experiences.

Published in Draconomicon: Metallic Dragons, page(s) 165.