This was definitely a smart move on Wizards part because cards unique to a certain product can drive the price through the roof, like what Dockside Extortionist did with Commander 2019 s Mystic Intellect precon
Not only do these pieces prevent life gain, but they essentially put a time limit on the game with their constant pressure
For example, you'll receive 2 free rares if you buy 1 additional item (2 total items), 4 free rares if you buy 2 additional items, 6 free rares if you buy 3 additional items, and so on
It doesn't cost much, and turns all damage coming at you into damage to the enchanted creature instead
Single Combat is the gold standard: it leaves everyone with a single creature or planeswalker of their choice, but wipes out everything else and prevents anyone from casting creature spells for the next turn
And since they'll draw to replace your casts