Space Wolves

This ability is described in full on the Army Rules page of Codex: Space Marines.

In battle, Space Marines swear mighty oaths to destroy the enemies of the Emperor and uphold the honour of their Chapter, and such vows are sacrosanct.

The battles fought and glorious victories won by the Great Companies of Fenris are retold in mighty sagas.

Each Detachment rule in Codex Supplement: Space Wolves includes a Saga you can complete, with additional effects that apply once you have done so.

The Great Companies of the Space Wolves are renowned for their ferocity and steadfast loyalty to the Imperium.

• If an ADEPTUS ASTARTES unit has a second Faction keyword on its datasheet, that Faction keyword is the name of that unit’s Chapter. For example, Ragnar Blackmane has both the ADEPTUS ASTARTES and SPACE WOLVES Faction keywords, and is therefore from the Space Wolves Chapter.
• You cannot include units from more than one Chapter in your army.
• If your army uses any of the Detachments from this book, it can include SPACE WOLVES units, but it cannot include any ADEPTUS ASTARTES units drawn from any other Chapter.
• Designer’s Note:* The rules presented in this section assume that the ADEPTUS ASTARTES units in your army are from the Space Wolves Chapter, but they can also be used to represent any Space Wolves successor Chapter, such as one described in the background section of this book, or even one of your own invention. However, players who wish to faithfully recreate the Space Wolves Chapter on the tabletop should only include SPACE WOLVES EPIC HEROES if their collection is intended to represent the First Founding Chapter itself; Logan Grimnar is the Great Wolf of the Space Wolves, for example, and not of any of their successors.

Only while fighting at the side of their battle‑brothers can the feral Wulfen control their frenzied aggression.

While this unit is within 6" of one or more friendly SPACE WOLVES CHARACTER models (excluding WULFEN models) or within 12" of one or more friendly WOLF PRIEST models, if it is not Battle‑shocked, add 1 to the Objective Control characteristic of INFANTRY models in it and add 3 to the Objective Control characteristic of VEHICLE models in it.