Once you disturb it, itll provide an alternate win condition, making one opponent lose the game once it hits three counters on your upkeep
While running a deck with just permanents that cost two or less mana in Standard mostly limits Lurrus of the Dream Den to very aggressive shells, playing Lurrus, of the Dream-Den as your companion becomes much easier in older formats, which place a higher value on efficiency
Can it blow away that best reach blocker
Paldean Fates benefits from being a special set with a smaller card pool, making its SIRs harder to pull
In between those is Zantetsuken, an ability that means "Whenever this creature deals combat damage to a player, that player loses the game." Thats just nasty, especially if you find a way to give Odin Trample or Flying
According the a FAQ on The Pokmon Companys website, other items lost during migration include cards from the HeartGold & SoulSilver Series, avatar items, certain coins, card sleeves, and deck boxes, the accounts friend list, Trainer Tokens, Event Tickets and the aforementioned coin currency