Rainbow Rare Cards are one of the most unique and valuable subsets of Pokmon cards, both aesthetically for collectors and strategically for players
Furthermore, if their trainer knows that their Beheeyem BREAK is about to get knocked out, they can send all the energy attached to them to benched pokemon to prepare for upcoming tactics while also slamming the foe with 100 damage
The value of the card depends on its condition, its rarity in the set, and its demand from collectors
If it has less than 2000 ATK, you gain LP equal to that monster's ATK." Related: reveal/excavate [spoiler=lose] The counterpart to gains
You dont want to put this on your battlefield if youre already behind in lands and ramp because those are minimal costs to pay for your opponents to deny you known card advantage
Another way you could face serious consequences from Konami