The only real downside to this card is it doesnt give haste, but I dont think winning with combat is how this will end for your opponents
Surrak and Goreclaw Bears really like being turned into missiles I guess, because heres another Commander that does it
(It can't be blocked except by artifact creatures and/or creatures that share a color with it.) Whenever equipped creature attacks, until the end of defending player's next turn, that player gets two rad counters whenever they cast a spell
His MTG card gets stronger whenever you cast such spells, with a second effect that allows Vivi to generate mana equal to his power so you can cast even more magic and buff him further
It really comes down to playstyles
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