What it does
"Come Fly With Me" is the start of a flavor name for a specific card—Niv-Mizzet isn't it, but this phrasing belongs to the card "Come Fly With Me" isn't a standard keyword in Magic. I should be honest: this isn't a recognized MTG keyword or ability.
If you encountered this phrase, it's likely a custom/joke card, a misremembered name, or flavor text rather than a real game mechanic. There's no official rules entry for it.
If you meant a real ability—like flying, flanking, or a flying-matters commander such as Kangee or Pramikon—let me know the actual card or keyword and I'll give you the proper rules breakdown, the common misplay, and how it performs in Commander. Happy to dig into the genuine mechanic you're after.
