That could happen any number of times you can muster, rather than just once per attack as is the case with Sword of the Animist
Its power is dependent on the power of artifacts and enchantments already on the battlefield, which means it will usually be pretty powerful in Commander since powerful artifacts and enchantments are sort of the core of the format, but this still means there isn't much more to say
And it'll surely find its way into every saga deck out there, from Tom Bombadil builds to brews with new Final Fantasy commanders like Terra, Magical Adept or Yuna, Grand Summoner
Punishing someone at the table, possibly someone you cant attack profitably through a pillowfort or doubling damage on someone you can easily swang at is pretty powerful
Collectors who buy during peaks risk losing money when the market corrects
That said, its a 4/5 that can get you card advantage every turn and that can be cast for as low as