Bjorn the Fell-handed

Each time this model would lose a wound, roll one D6; on a 5+, that wound is not lost.

If this model is reduced to 0 wounds, roll a D6 before removing the model from the battlefield, on a 6 it explodes, and each unit within 3" suffers D3 mortal wounds.

Whilst the Assault Doctrine is active, if an unmodified hit roll of 6 is made for an attack made with a melee weapon by a unit with this ability, that attack scores 1 additional hit on the target.

Each time an attack is allocated to this model, subtract 1 from the Damage characteristic of that attack(to a minimum of 1)

While a friendly Space Wolves Core unit is within 6" of this model, each time a model in that unit makes an attack, re-roll a hit roll of 1.