Qualifying is usually a short checklist: Set up the business
Greninja makes for a decent attacker in a pinch
By using Soul Exchange, one can tribute an opponent's monster in order to summon their Monarch, which will then reduce the opponent's card count even further with its "When this card is Tribute Summoned" effect
It generally sees play in decks with either dedicated or incidental lifegain, as its not hard to keep above its threshold, though this depends on how well youre set up to deal with aggressive decks
R Rare Forbidden Forbidden Evilswarm Ouroboros X DARK Rank 4 [ DragonXyzEffect ] ATK 2750 DEF 1950 3 Level 4 monsters Once per turn: You can detach 1 material from this card, then activate 1 of these effects
Basing on just the Rarity distribution and the Archetype cards, I personally think Crossover Breakers is a good collection and possibly the best Deck Builder set in a while