Lord Dante

Any enemy unit that loses as close combat against a model wearing a Death Mask suffers -1 modifier to its Leadership test.
Any enemy squad with a model within 6" of Dante at the start of that side's turn must pass a Morale check or immediately start falling back. The -1 modifier for being below half strength applies.

Gain +1 Attack (Already included for Veteran Sergeants and Space Marines wearing Terminator Armour)

Allows Infantry to move up to 12" and ignore difficult terrain, but must take a dangerous terrain test when ending a movement in it.

Upgrades Power Armour to a 2+

When a unit including a model wearing Purity Seals falls back, roll one extra D6 for the fall back distance, and then pick the D6 results you want.

The iron halo grants a 4+ invulnerable save.