The Promotional Cards are Infernity Archfiend, Infernity Dwarf, and Infernity Guardian
Crispin Initially seen as binder fodder, Crispin has slowly crept up the metagame as a defining card due to the presence of Stellar Pokmon, which require different energy types to attack, or simply due to the loss of other energy acceleration options
This is very different from, lets say, custom alter cards, as the art on those is the property of the people who make them, and also, you know you arent buying a real card. Play it safe if you print the back of an MTG card and put a custom-altered version on the front, and restrict its use to kitchen table rules
Occasionally, we may have a card shown as non holo, but the title stating as Holo ect