Wyrm - Yellow Bile
Level 11 Solo Gargantuan Mishapen Monstrosity
H45/heroALL++
Wyrm: Humorous Immunity.

Immune to Acid and Poison.

Aura of Fear.

Roll a WIL save instead of initiative. If you roll less than 15, you are Frightened on your first turn.

Burst of Knowledge.

Vulnerable to Psychic Damage, but causes enemies in 6 to take half the damage it takes.

Choose one.
  • Sinuous Charge.

    Fly 12. 1d20 + 10.

  • Tail Sweep.

    2 Targets. Reach 4: 1d20 + 10.

  • Acidic Bile Breath.

    Cone 6. 3d20. DC 15 DEX for half.

BLOODIED:

Immediately use Acidic Bile Breath.

LAST STAND:

The Wyrm is dying! 110 more damage and it dies. Until then, gain Oozing Bile: enemies that end their turn in 3 take 10 acid damage.

60′ long, with tarnished gold scales, misshapen heads, bulbous, black eyes, and tufts of wispy, white hair. Hoard knowledge in addition to gold, feigning wisdom to lure in victims. Behaviour: Erudite, treacherous, hateful Speech: Reasoned rasp. Woldish, Wyrm, Dwelve, Sylvan.

See DMB 96 for more on Wyrms (especially Vulnerabilities and Regeneration).