beast lorcana card Legendary Number Beast - Relentless - Rise

While this concept of a serialized card isn't new for Magic, cards with very limited printing with each copy uniquely numbered, with arguably the most well-known offering being the 1 of 1 The One Ring from the Lord of the Rings set a few years ago

Cards reprinted in Fabled remain legal for Core Constructed play

As for the Vanish ability, there are plenty of cards that have effects or abilities that trigger when another card is banished

Disney Lorcana is an officially licenced Disney trading card game, designed and manufactured by popular family board game publisher Ravensburger - the firm behind the excellent Disney board game Villainous (plus every Disney Villainous expansion)