yugioh doom of dimensions booster box CDU (24 Packs) – Yu-Gi-Oh! Official This Limited Edition Pack Offers A Unique Addition To Any Yu Doom of Dimensions – Yu-Gi-Oh!

IIRC in Yugioh there is only a certain number of Blue-Eyes (from the show?), so you could put a rule on the card 'there may only be X Blue-Eyes on the battlefield at any time', Star Wars CCG used to have permanents that you could have 2 or 3 copies of in play, in addition to stuff you could only have 1 of, the concept would work fine here too, only this could care about both players' boards

Then, if someone does get over Dragoon, it can special summon itself simply by banishing another Destiny Hero in the graveyard

The National Index and Yu-Gi-Oh rarity collections simply had a lower prio for me compared to my other collection goals

Head-to-Head Comparison: Loose Packs vs