Generally, the Pokemon cards are broken into three stages: (There are additional stages, but thats another lesson for another day) Basic Pokemon (In our example below: Charmander) Stage 1 Pokemon (In our example below: Charmeleon) Stage 2 Pokemon (In our example below: Charizard) Stage 1 and Stage 2 cards also referred to as Evolution cards
It being a Background also means you're adding white to your deck's colour identity, giving you access to spells like Path to Exile and Swords to Plowshares
It prevents the use of marked cards and ensures that decks are uniform, reducing the likelihood of cheating
If Atarka is also in play, a devastating attack can be made with Double Strike
Abyss Eye (Pitch Black) brings Mega Darkrai ex a fan-favorite Dark-type Pokemon with consistently strong collector demand
This card would be beneficial in a deck focused on aggressive strategies and card advantage, particularly in a deck that can protect and enable the Ring-bearer to attack consistently