Her set symbol (a chocobo, which you can see by the right of her type line) indicates she's from Final Fantasy Commander, so very likely a card we'll find in the Limit Break Commander precon, headed by Cloud, Ex-SOLDIER
Flatline While MTG has many exceptional evasion effects to maximize the chances of dealing damage, sometimes your opponents creatures are simply too powerful
A few select pieces of removal or team-wide pump effects ensures your finishing blow will crash through whatever last-ditch defense opponents can muster
On the other hand, this seems like exactly the sort of thing where we may turn around a year or two from now to find out this was just beginning to seed a bunch of cool cards
Thankfully, we've just learned a whole lot more about the upcoming MTG Final Fantasy Universes Beyond set thanks to this flood of great spoilers
"DISNEY LORCANA Is About to Become Your New Personality"