While the art naturally has no bearing on the effectiveness of a card, it anchors the player to them, ties archetypes together, and gives a unique feel from one card to the next
For example, we just went through the cycle of elemental Mirror Force cards, we previously got a cycle of Mega Monarchs, the Elemental Lord monsters, and plenty of other things
if that card is a Monster Card, change all of your opponent's face-up monsters to face-up Defense Position and your opponent's monster cannot change their battle position this turn
While this isnt unique to card games (see also Strawberry Shortcake or the various iterations of My Pretty Pony/My Little Pony), this fantastic method of marketing resulted in many of us thinking fondly on the series
Otherwise, discard the card you drew. This is a soft once per turn