Its casting trigger exiles the top half of an opponents library, quite literally, cutting half their cards out of the game
For experienced players transitioning: audit your current deck list against Sets 9-13
It gives all your nonlegendary artifacts myriad, which lets you attack at every opponent as opposed to needing to focus on just one
2021-03-19 A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.
It requires a touch of political finesse to assure it comes back your way a great bargain would be trading it to the player whos falling behind but it adds interest to the board state and often sparks interesting deals that you wouldn't get otherwise
Among the several cards that are presented, the Secret Rare version of Inteleon stands out