And here's the stage 2 write-up (I have not tweaked any of the damage yet). Also added map and terrain features for the entire fight I forgot in older post.
[SBLOCK=Infyrana, Stage 2]
Infyrana, Red Dragon Mage (stage 2)
Infyrana, Red Dragon Mage (stage 2) Level 14 Solo Skirmisher
Huge natural magical beast (fire) XP 5,000
HP 400; Bloodied 200
AC 28; Fortitude 26; Reflex 26; Will 28
Speed 8, fly 10
Resist 20 fire
Saving Throws +5; Action Points 1
Initiative +15
Perception +16, Darkvision
Traits
Draconic Alacrity: Infyrana gets a second turn at her initiative count -15.
Infyrana's Fiery Cunning: Against targets suffering ongoing fire damage, Infyrana's fire attacks cause them to take the ongoing damage again immediately.
Draconic Recovery: At the end of each of her turns, Infyrana removes a dazed, dominated, stunned, immobilized, or restrained condition.
Roiling Flames • Aura 1 : Any creature beginning its turn in the aura takes 10 fire damage. Creatures with fire resistance take no damage but lose their resistance while in the aura.
Standard Actions
Claw • At-Will
Attack: Reach 2; +19 vs. AC
Hit: 2d8 + 12 damage and pushed 1 square.
Tail Sweep • At-Will
Attack: Close blast 2; +19 vs. AC
Hit: 1d8 + 8 damage and knocked prone.
Bite • Recharge when no creature grabbed
Attack: Reach 2; +19 vs. AC
Hit: 2d8 + 12 damage and grabbed, taking 2d8+12 auto-damage end of their turn until escape
Dragon's Fury • At-Will
Effect: Infyrana makes 2 claws, 1 bite, and 1 tail sweep attack, then shifts 2 squares.
Immolating Breath Weapon (fire) • Recharge when first bloodied
Attack: Close blast 5; +17 vs. Reflex
Hit: 3d12 + 6 fire damage and 10 ongoing fire damage (save ends). Critical +3d12 and lose any fire resistance.
Miss: Half damage.
Pillar of Blazing Death (arcane, fire, necrotic, teleportation) • At-Will (planar firestorm)
Requirements: Can only be used during Planar Firestorm.
Attack: Close burst 5 (one creature); +17 vs. Will
Hit: 5d8 + 10 fire and necrotic damage, dazed and 10 ongoing fire damage (save ends both), and teleported anywhere in lair. If target is already taking ongoing fire damage increase by 10.
Effect: Burst becomes a zone until end of this stage; enemies within the zone suffer vulnerability 10 fire.
Wall of Fire (arcane, conjuration, fire) • Daily
Effect: Area wall 8 within 10 squares; Infyrana conjures a wall of fire which blocks line of sight and costs 4 squares of movement to enter. Any creature starting adjacent takes 1d6+6 fire damage. A creature moving into or starting inside the wall takes 3d6+6 fire damage.
Sustain Minor: The wall persists.
Move Actions
Now, Elementals of Flame! • At-Will (planar firestorm)
Requirements: Can only be used during Planar Firestorm.
Effect: Infyrana summons 10 fire elemental sparks. Only 10 elementals may be in play at a time.
Minor Actions
Burning Gaze (fire, gaze) • At-Will
Effect: Ranged 10 (a creature taking ongoing fire damage); The target takes a -4 penalty to its next save against ongoing damage.
Triggered Actions
Wing Snap • At-Will
Trigger: An enemy moves adjacent to Infyrana.
Attack (Immediate Reaction): +17 vs. Fortitude
Hit: 2d8 + 8 damage, pushed 2 squares and knocked prone.
Planar Firestorm (worldbreaker) • Encounter
Trigger: When reduced to 200 HP and again at 0 HP.
Effect (Free): Infyrana activates the planeshift ritual focus, and teleports to any square she can see. Enemies take 10 ongoing fire damage (save ends), on a failed save increase by 10 and teleported 6 squares.
Skills Arcana +17, Bluff +16, History +17, Insight +16, Intimidate +16
Str 20 (+12) Dex 20 (+12) Wis 18 (+11)
Con 20 (+12) Int 20 (+12) Cha 18 (+11)
Alignment evil Languages Common, Draconic
[/SBLOCK]
[SBLOCK=Other Encounter Notes]
In this stage, Infyrana activates the Planeshift Ritual Focus, then engages the PCs in a fierce melee skirmish. She focuses on dealing the maximum amount of ongoing fire damage as possible. Her "Worldbreaker" in this stage is a Planar Firestorm which allows her to summon fire elemental minions and conjure a devastating pillar of black flame.
Using the Planeshift Focus Skill Challenge is a complexity I skill challenge (4 successes before 3 failures) with the special caveat that a failure accrues each round no attempt is made to control it by the PCs. Successes are accrued by approaching the ritual focus and taking minor action Arcana/Religion/Thievery DC 24 checks. Victory inflicts vulnerable 10 [keyword according to planar attunement] on Infyrana for one round, and each PC may recharge an encounter power, re-roll initiative, or spend a healing surge as a free action. Defeat, however, activates Infyrana’s
Planar Firestorm and all PCs gain vulnerable 10 fire for one round. At the DM’s discretion, Dragon Mountain may planeshift!
Fire Elemental Sparks are 12th level minions from
Revenge of the Giants with updated math. I'll need to modify further, since they'll be utterly ineffective (11 fire damage) against the party's mass fire resistance (11)...
Additional Terrain will include some kind of fire spouts, molten gold, or lava as suggested.
[/SBLOCK]
[SBLOCK=Map & Terrain (All Stages)]
(2) Braziers of Arcane Flame: (AC/Ref 4; Fort 15; HP 100) Fire attacks made within 2 squares of a brazier deal +10 fire damage. If destroyed, the brazier deals 20 fire damage to all creatures within 2 squares.
Chasm: Any creature which falls into the chasm plummets 80 feet into a fast underground river for 4d10 damage (ending any ongoing fire damage). Swimming out of river requires Athletics DC 28 (-1 healing surge on a failure), and climbing the chasm requires three Athletics DC 20 checks / 3 rounds at climb speed 3 (normal).
Treasure Mounds: Difficult terrain to ascend. If a creature is knocked prone or forced to move on a mound, they must make a DC 15 Acrobatics / Athletics check or fall prone and slide to the bottom of the mound. A PC can search for a specific known treasure with Perception DC 20.
Crystal Ball: As a purely story effect, Infyrana’s crystal ball projects images of the PCs as they explored Dragon Mountain, only from the kobolds’ perspective (e.g. kobolds getting ready for an ambush or laughing at PC suffering).
[/SBLOCK]