Its perhaps an overly semantic difference, but they didnt make the cut for the main list, though theyre closer than examples like Faldorn
It also benefits a ton from adding in cards from the main set, such as the main set version of Neriv, as the one in Mardu Surge is fairly useless to the strategy
Overall, I think this is a solid, playable card that should see use across multiple formats
And hey, worst case you might just win a game with an unblockable attacker
The name kind of explains the concept: do something that your opponent doesnt expect you to do
It is just such an impactful card , able to disrupt or shut down entire strategies, and it is great against a plethora of decks in the current format