Yulthruk

Trigger Yulthruk succeeds at a saving throw against an arcane spell cast by another creature

Effect Yulthruk inhales some of the averted energy and becomes Quickened until the start of his next turn. He can use this extra action to Cast a Spell or Sustain a Spell

10 feet. A creature entering the aura or starting its turn in the aura must succeed at a DC 28 fortitude save or become Sickened 1 (plus Slowed 1 as long as it's sickened on a critical failure).

While within the aura, the creature takes a -2 circumstance penalty to saves against disease and to recover from the sickened condition. A creature that succeeds at its save is temporarily immune for 1 minute.

Effect: Stench

Requirements The ghast is adjacent to the corpse of a creature that died within the last hour.

Effect The ghast devours a chunk of the corpse and regains 6d6 healing Hit Points.

It can regain Hit Points from any given corpse only once.

Frequency once per day

Requirements Yulthruk hasn't acted yet on his turn

Effect On his turn Yulthruk can Cast a Spell he's prepared and already cast this day without spending a spell slot. Yulthruk must still meet the spell's other requirements.

Saving Throw DC 28 fortitude

Stage 1 carrier with no ill effect (1 day)

Stage 2 3d8 void damage and regains half as many Hit Points from all healing (1 day)

Stage 3 as stage 2 (1 day)

Stage 4 3d8 void damage and gains no benefit from healing (1 day)

Stage 5 as stage 4 (1 day)

Stage 6 dead, and rises as a Ghast the next midnight

Any living creature hit by a ghast's attack must succeed at a DC 28 fortitude save or become Paralyzed. It can attempt a new save at the end of each of its turns, and the DC cumulatively decreases by 1 on each such save.

Yulthruk jumps up to half his Speed. This movement doesn't trigger reactions.