As for the effect of the card - casting 7 CMC worth of instants isn't hard, so this can often be a 1 mana 4/4 flier that pings two - and if you happen to be in a pillow fort deck that can grant deathtouch to your creatures, that works just fine
This is a bit of an edge case since they aren't proper cards and are not typically available in constructed play, but I think it's fun when things get weird so I OKed them (with the exception of Power Play, because it undermined the structure of the tournament)
Tinker Time (Green-Blue-Red deck)100-card ready-to-play March of the Machine Commander Deck with 2 Traditional Foil Legendary cards and 98 nonfoil cards 10 Planechase cards and 1 planar die to trigger unique abilities and jump across the Multiverse 2-card Collector Booster Sample Packcontains 2 special treatment cards from the March of the Machine main set, including 1 Rare or Mythic Rare and at least 1 Traditional Foil card Deck introduces 10 never-before-seen MTG cards to Commander Accessories1 Foil-Etched Display Commander, 10 double-sided tokens, Life Tracker, and deck box Engineer Their Destructionally with a deviously inventive artificer, collecting artifact tokens to strengthen his artifact creature creations into a terrifyingly advanced fighting force
Otherwise, youre forced to make token copies of itself forever, ending the game in a draw
Predicting the next Magic bans can be a tricky business these days
Exile 20 cards from their library doesn't do that much prior to winning, certainly not compared to annihilating them
