Hellforged Leviathan Dreadnought

If this model is reduced to 0 wounds, roll a D6 before removing it from the battlefield. On a roll of a 6 it explodes and the hellish energies at its core are unleashed. Each unit within 6" suffers D3 mortal wounds unless it is a Psyker, in which case it suffers D6 mortal wounds instead.

A unit with this ability has a 5+ invulnerable save against Shooting or Overwatch attacks, and a 4+ invulnerable save against Melee attacks in the Fight phase.

At the end of each Fight phase, roll a number of D6 for this model equal to the number of models that were slain by it during this phase; for each dice that scores a 5+, this model regains one lost wound. This model cannot regain lost wounds by any other means.