MTG designer Mark Rosewater, on a trip to Japan, saw that players were using beautiful cards to represent their tokens and decided to get in on the action
(You cannot halve the same damage twice this way.) If this card is sent from the field to the Graveyard: You can target 1 Spellcaster-Type monster in your Graveyard
Whenever you discard one or more nonland cards for the first time each turn, create a Junk token
Depending on context, these cards may be called prison pieces, hate cards/hatebears, sideboard cards, or, in some circles, stax cards after the ancient Smokestack-based deck which popularized not letting the other person play as a strategic archetype
Blue-Black-Red-Green (UBRG) "Chaos" Blue is eager to discover the results of empirical experiments