There's also the tiny problem of this costing seven mana, all of it colored, but the combination of both winning the long game and keeping you alive to see it makes seven feel cheap, and there's enough behind this card that there is no need to worry about following it up with another copy unless your opponent can fire one back at you
And you can sacrifice a token blocker or the token copies from Fable of the Mirror-Breaker at instant speed with this, so a number of decks likely want one copy
Last but not least, hes Inkable, meaning you dont need to use up valuable uninkable spots for him in your deck
It deals damage equal to its power to each other creature
And whatever you do, dont go cracking packs hoping to hit a lottery-ticket-level rare Legends card
Double strike means the creature hits twice, combining the first strike ability with regular damage