Shardfall is a blanket term meant to describe when two or more shards collide. Shards emerge from the Velethe in the context of their own emergence. Rogue shards can emerge within either the vacuum or plenum and move towards shards at the Velethe and collide from either side. In some cases the shards on the Velethe collide with each other, or in rare cases come into emergence superimposed and rip an existing shard in half.