Multiversal Incursion

Doubling your whole board is not new: the effect has been sitting in green and red since the days of Parallel Lives and its ilk, usually taxed by a token or enchantment restriction. What this does differently is put the mass-copy into blue at sorcery speed and, crucially, strip the legendary supertype off every copy it makes. That single clause is the whole engine. The legend rule normally makes copying your own legendary permanents pointless: the duplicate hits the battlefield and one of the pair dies to the state-based action. Here, the tokens arrive already non-legendary, so a board of unique creatures (commanders, planeswalkers-turned-creatures, one-of-a-kind value engines) suddenly gets to keep both halves. The nontoken restriction is the counterbalance: you cannot loop the copies into more copies, so the payoff scales with the board you have assembled, not with recursion. At seven mana in double blue, this is a payoff spell built for a battlefield already dense with enter-the-battlefield triggers and singular bodies you were never allowed to duplicate before. The design is less about raw token count and more about breaking the specific lock the legend rule places on your best creatures, and doing it in a color that historically had to counter or bounce those creatures rather than multiply them.