How big would a vanilla creature (no abilities) have to be for each mana cost to be usable in Modern? Assume easy color requirements (1C, 2C, 3C and so on).>C
3/3 would be good enough, right?>1C
Would 5/5 do it?>2C
Is 7/7 for three mana enough to be playable just for the stats?>3C
Is 10/10 enough?>4C
Is anything big enough? Would a 20/20 be played in serious Modern decks if it cost 5?