The Offensive Rune is a chaos ability, which makes sense as Thorgar's Chaos soul is a rune master.
The Defensive Rune is a neutral ability though, so Lawful Thorgar the Cleric can use it. Is this a misprint? I'm guessing it should also be Chaos.
I don't see why the Lawful Cleric couldn't put down a defensive rune. Also the summoner guy gets access to 2 summoned companions but one of them is neutral so the chaos can access him too.
Makes sense to me