Mindwrack Demon's delirium triggered ability does not include an intervening "if" clause. This ability triggers at the beginning of your upkeep regardless of the number of types in your graveyard, and it checks that number as it resolves to determine whether you lose 4 life or not.
Because you consider only the characteristics of a double-faced card's front face while it's not on the battlefield, the types of its back face won't be counted for delirium.
The card types in Magic are artifact, battle, creature, enchantment, instant, kindred, land, planeswalker, and sorcery. Supertypes (such as legendary and basic) and subtypes (such as Human and Equipment) are not counted.
This printing is one of 2 catalogued treatments from PRM — the lineup includes Foil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #60480 of *Magic Online Promos*, the promotional run that shipped alongside the May 2017 Magic Online release.
Card type: Creature — Demon, color identity black, printed at mythic. Mythic rares historically land in roughly one out of every eight boosters at standard print densities. Mana cost: {2}{B}{B} (4 converted). Keyword abilities: Flying, Delirium, Trample, and Mill.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #18,885 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Daarken. Rarix catalogs 1,287 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Daarken
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
In some rare cases, you can have a token or a copy of a spell in your graveyard at the moment that an object's delirium ability counts the card types among cards in your graveyard, before that token or copy ceases to exist. Because tokens and copies of spells are not cards, even if they are copies of cards, their types will never be counted.
The number of card types matters, not the number of cards. For example, Wicker Witch (an artifact creature) along with Catalog (an instant) and Chaplain's Blessing (a sorcery) will enable delirium.
