UR Ultra Rare Constellar Sombre X LIGHT Level 4 [ FairyEffect ] ATK 1550 DEF 1600 You can only use each effect of "Constellar Sombre" once per turn
Yes, it will benefit your other opponents similarly to the C17 curse cycle (Curse of Opulence, Curse of Disturbance, etc.), but it will also incentivize those opponents to send more Creatures towards the cursed player to benefit from the free card advantage (and additional damage thanks to Trample)
You dont need to grind your opponent into nothing
Metang has the Metal Maker ability, which allows players to look at the top four cards of their deck and attach any amount of Metal energy they find among those cards to their Pokmon in any way they like
Progressive tutorial system from basic to advanced
Meowth #106, Rotom ex #126, and even sealed blisters overshadow it from a cost perspective, and considering you're guaranteed to get a card by buying a single, I'm tempted just to outright buy it instead