Electric Terrain is an environment-altering Electric-type move. It is the signature move of Zephy.
Electric Terrain changes the environment for five turns, which affects all Pokémon that are on the ground (i.e. not Flying or Levitating) and not semi-invulnerable due to moves like Dig or Dive. Pokémon that are affected cannot be put to sleep and their Electric-type moves do 50% more damage.