New “terrain” moves!

Electric Terrain:
- Grounded Pokemon cannot fall asleep.
- Powers up Electric attacks of grounded Pokemon.
- Changes Nature Power to Thunderbolt

Misty Terrain:
- Grounded Pokemon are immune to status conditions.
- Halves power of Dragon attacks done to grounded Pokemon.
- Changes Nature Power to Moonblast

Grassy Terrain:
- Grounded Pokemon restore a 1/16th of their max HP per turn.
- Powers up Grass attacks of grounded Pokemon.
- Changes Nature Power to Energy Ball

Grounded means not Flying or under the influence of Levitate/Magnet Rise/Telekinesis. In short, if it can be hit by Earthquake, it will be affected by terrain moves.

Terrains are separate from weather, so they do not overwrite each other. Terrain moves last 5 turns. Terrain moves affect all grounded Pokemon, including enemies.