Huron

If Huron is in the Army, any units selected from Codex: Space Marines, Codex: The Badab War, or units that count as being selected from Codex: Space Marines in the Tyrant's Legion count as being Stubborn as long as he is on the table.
The unit will automatically pass any Morale checks they have to take, even if faced by a situation or opponent that would normally cause them to automatically fail. Note that they still must test for pinning as normal.

Once per battle, Huron may select an enemy unit within line of sight and call down a barrage. Place an Ordnance template over the unit and then scatter it 2D6". If a hit is rolled, scatter it the lower of the D6s in the direction of the small arrow. Any model under the template receives a S9, AP3 hit.

Gain a 2+ Armour save and 5+ invulnerable save

The iron halo grants a 4+ invulnerable save.

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.

Individual model. Can join other units in battle