Of course, when the original darkness energy debuted, it was certainly not one of the most valuable cards from Neo Genesis, but it was already a rare card and surprisingly it caused any darkness-type Pokemon to deal 10 more damage to the foes active Pokemon
Athreos's ability allows a player to return creatures to their hand when they die, rather than put them into their graveyard, unless their opponent pays 3 life
However, you should have somewhere between eight or nine Traps in this build, so you should consider adding copies of Karma Cut (which have almost become a necessity in the current meta), Paleozoic Canadia, or Wall of Disruption
Debuting at the end of season one of GX was the Sacred Beasts, a more evil version of the god cards in Yu-Gi-Oh
Kahkki, Guerilla of Dark World If this card is discarded to the Graveyard by a card effect: Target 1 monster on the field