Isn't it about time for old Silent Bob to get a character jack? I was thinking a Templar's simple no-nonsense design would mesh well with the High Reclamer/Testament. It's not a shouty jack, it just stands there and does its job.
Storywise, the jack would start following the Testament around while he does his thing, and nobody would know what to call it. Then one day when back in Sul the Harbinger would offhandedly mention the name of the jack and word would spread. Later the Testament would show up unexpectedly at the jack yard with his Templar in tow and a giant sword resembling a Caspian Battle Blade of unknown origin but inscribed with runes in a trailer. It is said that Menoth himself guides the jack's hand, but only the Testament knows for sure.
The Bulwark of Caen
Stats: As Templar +1 MAT/RAT
Sword of Judgement: POW 7, P+S 18, Reach, Disintegrate, Magical
Affinity [High Reclaimer]: All area within 5" of this jack is considered to be in the controlling warcaster's control area.
Supernatural Support: During this model's activation, one attack or damage roll may be boosted without spending focus.