Appearing in the Crystal Caves, Crystals move somewhat slowly in a random direction, and do not try to chase the player. They deal lethal contact damage, so fighting in close quarters is not recommended.
When the player comes within its line of sight the Laser Crystal charges up and fires a burst of 4 laser beams. Each laser does 1 damage per hit animation, up to 2 damage. The Laser Crystal doesn't move nor predict the player's movement while firing. You can see where it's aiming by paying attention to pink sparkles created in a line marking where it will strike. Similar to the Sniper and Bandit, it cannot shoot if you are too close to it.
Laser Crystals are supposed to be able to transform into their Elite Lightning Crystal variants under similar conditions as Snow Tanks and Golden Snow Tanks. However, due to an error in the code, this can only happen on area 4-2, which cannot be reached in normal gameplay