This works even against a spell that can't be countered
Lands, Rocks, Ramp Since River costs three mana there is no rock, I can run to speed her up save Sol Ring so my rocks will look differently
I recently observed a French YouTuber opening the new Scarlet and Violet set (2 ETBs and 2 3 pack blisters) and saw a sequence of commons that were the same at least twice, so was wondering if it was a consistent and reproducible method which from your research seems to suggest so
It doesn't use the stack and it can't be responded to
Finally, colorless cards, such as some artifacts, do not have any colored mana requirements but still require a general amount of mana to be spent to play
Channel: Especially with the higher life total, the ability to just do whatever you want on turn 2 makes for games which it takes longer to shuffle for than to play