The Green Knight is an insubstantial, ghostly being that can pass through barriers as if they were not there at all. He suffers no movement penalties for moving over or through any kind of terrain. He never suffers any movement penalties, even f om such things as magical effects. He can even move through impassable terrain, so long as he does not encl his move within impassable terrain. He may not, however, move through other units. Nevertheless, the Green Knight does block line of sight (no one can see through him), and cannot see through anything himself that would normally block line of sight.

Because he is insubstantial, he can't be harmed except by magical attacks, Daemons or other ethereal creatures, though he may be affected by spells as normal.

He also cannot join or be joined by units or characters.