how rare is the ancient mew card Pokémon TCG Cards for sale but overall look nearly unplayed with no major defects PSA 10 1999 Japanese Ancient

At its base level a Reverse Holo doesn't add much rarity to the base card but as soon as you start getting to Rare Holo and into GX or V cards they can start accumulating more worth

EX4-058 SR Digimon Lv.6 Ravemon Color Purple Cost 11 DP 11000 Digivolve Cost 1 Purple 3 from Lv.5 Form Mega Attribute Vaccine Type Cyborg Card Text 1 [Effect] Jamming [End of Attack] By deleting this Digimon that has a digivolution card with [Bird] or [Avian] in one of its traits, at the next end of your opponents turn, play 1 [Ravemon] from your trash without paying the cost

Lorcana: Archazia's Island Booster Box contains 24 boosters

This also means that if you miss an Energy attachment, you have an attacker that works for 1 Energy

They all have their own merits, but its important to consider what youre hoping to get from them