Unfinity mixes retro-science fiction with space circus, amusement park, and carvnial tropes in the newest "Un-set," which are humorous sets intended for casual play. Unlike previous "Un-sets", Unfinity is the first to feature black-bordered cards. Acorn holofoil stamps will be applied to cards to replace the significance of silver borders. Unfinity also features "stickers" that can be placed on cards to enchance the effects of them.
Featured art styles in Unfinity are retro-pop style showcase cards alongside borderless cards. Basic lands and "shocklands" feature the borderless art treatment. [source]