A little binder symbol appears in the bottom left hand corner of the card if you already have it
Delirium Whenever this creature attacks for the first time each turn, if there are four or more card types among cards in your graveyard, untap target creature
Now winning through combat damage gives way to combo kills the further up the brackets you go, but I can see Cloud decks rocking well in Core and Modified Brackets
The aforementioned Blue-Eyes Ultimate would have been a easier move to pull off
Melvin: Is this like a sandwich artisan but uses monsters
1 Borderless common or uncommon 4 Commons 2 Nonlegendary uncommons 1 Legendary uncommon 1 Legendary uncommon (in 50% of boosters) or a nonlegendary rare or mythic rare 2 Wildcards, including rares, mythic rares, borderless rares, and borderless mythic rares 1 Legendary rare or mythic rare 1 Nonlegendary rare or mythic rare 1 Traditional foil card 1 Token/ad card or card from The List 1 Art card, with a gold-stamped artist signature in 10% of boosters