Combat Engineer
Want irrefutable proof of civilization's advance? Look at war. Man gets better at killing with each one.
Boost an ally by 5. Crew.
*Crew:
Kaedweni Sergeant, Ballista, Reinforced Ballista, Trebuchet, Siege Tower, Siege Support, Blue Stripe Scout, Siege Master, Combat Engineer, Battering Ram, King Foltest, King Radovid V, King Henselt, Ronvid the Incessant, Foltest's Pride