While not the faction's core unit, Voltswappers are the key to major circuit turns. Their ability to connect the whole board and trigger Chain Lightning makes them a significant threat.
The flexibility of their Lightning Step ability, which can be activated, either before or after moving them, making it easy to place them exactly where needed - often without spending a move.
Voltswappers are deceptively cheap since they often die without giving magic to the opponent. This makes them useful not only for big circuit turns but also as efficient pokers. For instance, a Voltswapper can attack for 1 Strength, die to Chain Lightning, deal another damage, and open a path for a ranged attack. This sequence is a integral part of the Storm Goblins' poking arsenal.