It's embellished by the same exciting shounen element you'd expect from two over-powered warriors, but the hype created through a back and forth card battle
1 Traditional foil rare or mythic rare that's an extended-art, borderless, or retro frame card, or one of the following: A double rainbow serialized Eldrazi (250 of each) A foil-etched rare (9.3%) or mythic rare (3.9%) A traditional foil Special Guests mythic rare (10 cards total4.4%) A textured foil Special Guests Elemental (1.9%) or DFC planeswalker (1.9%) The remainder of this slot has the same content as the non-foil slot above with the percentages reduced appropriately to account for the inclusion of serialized, foil-etched, textured foil, and Special Guests cards
This is likely because full art cards have fully rendered backgrounds and proper coloring, which tends to be favored by casual collectors more than the sparkly rainbow filter of the Rainbow Rare cards
Another option is Aetherworks Marvel: Creatures (15) Planeswalkers (2) Lands (20) Spells (23) This deck also checks many of the Brainstorm boxes it naturally plays shuffle effects (Fabled Passage and Attune with Aether) and it specifically has combo pieces that it wants to get rid of and put on top of its library
A player loses the game after having been dealt 21 combat damage from any one of them, not from both of them combined (although your Background won't usually be a creature anyway)
Check The Card's Evolution One of the easiest ways to tell if a Pokmon card is fake is to check the card's evolution