The card must be able to be built-around in multiple ways in the format (sorry The Rack, Scapeshift, and Ad Nauseam, you don't count.) At least one deck that uses the card must be Modern viable at the time of this publication Now with only ten spots to use, I know I'll inevitably leave out some favourites, so please don't be shy in the comments with some honorable mentions
Right out of the box, the specific artifact theme is loud at 48 nonland cards in line with Daretti, Scrap Savant, 38 of which I would be hard-pressed to cut
Applications of Different Playing Card Sizes Gaming : Poker size is ideal for cas*no games and card tournaments
Whenever another creature enters the battlefield under your control, Terror of the Peaks deals damage equal to that creature's power to any target
Since Containment Priest has flash, you can often catch people by surprise and put a stop to mass reanimation or even take most of the punch out of a huge Genesis Wave by preventing creatures from entering the battlefield