Glaciation - Blessed Walls prevents units from getting knocked off a wall segment. Hurricane - Blow them away! knocks off units from wall segments. (Description missing, already added in description cleanup megathread) Even though Glaciation should prevent the units from getting knocked off, they do. Interactions with "Burrower - Acid Spit" and "Deathglider - Shriek" function correctly and the units stay on top of the wall.