Sceptilespy

Dead Zone- "The life is sucked out of..., everywhere"

Hoopa-Unbound gets a 2x boost to all of it's attacks.

1.5% boost to all Ghost type attacks

"The undead are powerful in this lifeless hell..."

1.2% boost to all Dark type attacks

"BOO!"

Hyperspace Fury becomes Hyperspace Genocide.

2.0% boost to Hyperspace Genocide

All Pokémon not Dark or Ghost type lose 1/12 of their health every round

0.2% decrease to Fairy Type moves.

"The light means nothing here"

Dazzling Gleam turns the field into a Holy Field.

So this field is pretty straight forward, and it's quite obvious the Pokémon this is intended for. I'll probably be making a LOT of updates on these fields. And most of these fields are lategame concepts I've come up with a while ago. So bear with me please.