Karina, Lady of Trials
Level 20 Solo "Human" Archdruid of Rebirth
M135/heroAll++
Crucible of Dread.

Whenever Karina or her minions attack, the target(s) must endure a trial to face past trauma and failure (DC20 WIL save). Run the variant of the ability that matches the result. A Creature can choose to take a Wound to succeed on the save instead of rolling.

Shapeshifted Greatwyrm.

Karina has Telepathy and can cast all Stormshifter (Druid) spells outside of combat.

Choose one.
  • Controlled Burn.

    Teleport 8, then (Range 8)

    Crucible Failure: 4d10+20 Necrotic, +1 Wound (ignores Defense). On Death: Crumble to ash.

    Crucible Success: 4d10+20 Fire, restore 1 Wound (ignores Defense, does not cause Wounds).

  • Razing Fire (1/Round).

    (4x4 Area adjacent to Karina or a previous Razing Fire)

    Crucible Failure: 4d10+50 Fire (ignores Defense).

    Crucible Success: 4d10+50 Psychic (ignores Defense, does not cause Wounds).

  • From the Ashes (1/Round).

    Summon 3/Hero Wildfire Spirit minions (size: d10, Fly 8) anywhere within all prior Razing Fires.

    When a minion attacks:

    Crucible Failure: Necrotic damage.

    Crucible Success: Fire damage (does not cause Wounds).

BLOODIED:

Karina can no longer maintain her Human form and reverts to her Topaz Dragon form. She becomes Gargantuan, Razing Fire expands to a 6x6 Area, and she gains Fly 12 and Sapping Breath.

Sapping Breath (1 use). Teleport 8, then (Cone 8) DC20 STR save or 5d10+50 Necrotic damage, Poisoned, and Slowed, half damage only on save.

LAST STAND:

Karina is nearly down! 200 more damage and she's defeated for now, unless killed by Tiamat's Temptation. Until then, Razing Fire expands to an 8x8 Area, and she gains New Life, which she uses on her next Turn, after which Razing Fire can no longer be used.

New Life (1 use).

(All Heroes within the Area of all prior Razing Fires) Rain falls and trees begin to magically regrow and:

Crucible Failure: 1 Hero that died within a Razing Fire's area is resurrected under Karina's control at half HP and all Wounds cleared. A Hero can rescue them from Karina's control by succeeding on a DC20 Influence check.

Crucible Success: 1 Hero that died within a Razing Fire's area is resurrected to half HP and all Wounds cleared.

To keep the players involved if their character falls under Karina's control, have them roll the dice and choose what attack to make. If the initiative order is dynamic for your group each Round, have the GM-controlled Hero go after the first player-controlled Hero, and then alternate if there's more.