Brawl Not Legal Vintage Not Legal Timeless Not Legal Commander Not Legal Pauper Not Legal Oathbreaker Not Legal Penny Not Legal Dual Doomsuits Artifact Contraption Whenever you crank this Contraption, each time a source you control would deal damage this turn, it deals double that damage instead
You want to ramp out your commander, accumulate some experience counters to discount your spells, and assemble a game-ending combo to finish things off
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When you play an enchantment (especially on curve), you typically forgo casting any other spells that turn
If you really want to boost the +1/+1 counters subtheme in the deck (going for that Twenty-Toed Toad/Simic Ascendancy win, eh?), then throwing in Bill and the Brawler give that plan an immediate shot in the arm that can raise the viability of those win conditions right quick
Of course, if you're putting it in your deck, it means you've taken that into account and are probably running it in decks that look to Donate it to opponents with cards like Zedruu the Greathearted, Stiltzkin, Moogle Merchant, and Iroh, Tea Master