Note that without a specific power or stunt, these are all outside the realm of evocation. Others have implied this, but I thought that should be made clear.
I had a villain who instilled a magical block with earth evocation. He created a series of wide circles (threshold, which I let him treat as armor, so half spell strength effect). If the characters cast through it, or walked through it, their power was limited (spell effect shifts were reduced by a number of shifts equal to the threshold value).