packs in a booster box mtg Modern Horizons Pack with a possibility of Art cards MTG Product Guide | Magic:

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Put the rest on the bottom of your library in a random order. While three or less might not sound like much, MTG is full to bursting with cards which only cost three mana or less that can win a game

Maybe the blue/red deck is fine with this because it costs 4 mana, but otherwise I think its too weak

Enter the Bargain, with twice the cost, only skips your draw step, you draw them immediately to cast them or in response to something, and it's even legal as a four of in Vintage where it used to be on the B&R list

Laboratory Maniac is not strictly worse than Thassa's Oracle, seeing as some combos require you to have this card in play and draw cards later