Now I could be mistaken, but is this the first time a card has referenced a single creature doing combat damage to more than one players
You can play this card in tanky lineups (maybe find a place for it in your new Tera decks, even), or pair it with Energy recycling decks like Gardevoir ex to counteract its Energy trashing
It is a little bit too easy to make a deck secure against Chant locks and so the real big weakness of this deck is when people know it is coming
The idea of the rule is simple: in the wake of fan-favorite LSV losing in the Top 8 of a recent Pro Tour after mulliganing to four in the last game of the finals, the London mulligan is designed to decrease the pain of mulliganing and the number of non-games that happen as the result of one player having a hand that simply doesn't do anything (like no lands, for example)
And even if you aim to extend the game far beyond the next turn, youre almost always trading up on mana while remaining even on cards (and, in fact, seeing deeper into your library)
30% of the time in Modern Horizons 2 Set Boosters, you will instead get a rare or mythic raremaybe even with a showcase sketch treatment, showcase retro frame, or borderless treatment