The Rollercrusher Ride is a mythic Legendary Enchantment card from Duskmourn: House of Horror Promos (PDSK), collector number 155s. Current market price: — (foil $1.29), TCGplayer market prices via Scryfall.
Delirium — If a source you control would deal noncombat damage to a permanent or player while there are four or more card types among cards in your graveyard, it deals double that damage instead. When The Rollercrusher Ride enters, it deals X damage to each of up to X target creatures.