pokemon booster box scarlet and violet Pokemon: & - Twilight Masquerade giving you a total of 360 cards to enhance your collection Pokemon™ Scarlet & Violet Series

This means that "Harvester" and "Brutal Dozer" were mandatory 3-ofs, even though multiple copies would not be necessary due to the resource loop, which increased the odds of drawing them with the effect of "Tunneller", while also reducing the number of non-engine cards the Deck could run

The difference is that these cards cost more to play - two and three mana respectively

As far as I can tell, the addition of " If your opponent controls any monsters " and " and if you do " would then (if I'm not mistaken) allow this card to be activated pointlessly, even if the opponent has no monsters

Unfortunately for players looking to use this incredibly powerful card, however, it doesnt come cheap