The wizard strikes his staff upon the ground and, with a low rumbling noise, a gaping crevasse opens within 24" The Crevasse is 6" long and 1" wide and may be represented with a suitable length of card or in any convenient fashion.
Any model beneath the area covered by the Crevasse must roll equal to or greater than its Initiative value on a D6 in order to leap aside. Any model failing to do so falls into the Crevasse and is killed as the ground closes again with a snap. Chariots and other war machines are swallowed automatically, although their crews can save as described, and buildings will collapse on the D6 roll of a 4 or more if half of their ground area lies over the Crevasse.