Like creatures and enchantments, they hang around on the field after being cast, can have static, triggered, or activated abilities, and tend to die to removal
In the West, smaller subsets, like the newly released Pokmon TCG Triple Beat subset, are put together to make one large set, which is why Western collectors can expect to see these cards around the end of March or early April
Artificers been around for a while
Like Set Boosters, your display purchase may be eligible for the Buy-a-Box promoask your local store
Professional grading services (PSA, BGS, CGC): Grading directly affects perceived scarcity and value
However, these split cards are permanents that enter the battlefield when they resolve, and the second room can be opened at a later time by paying its mana cost