too long ago didnt remember: multiversal scholar druids cooperate across multiplanar contexts, the organization is peaceful but not authoritative; hijinx ensue and sometimes, rarely, it is a magical duel of wizards. wizards know the language that itself is the source of the universe; describing a thing with magical conviction in a formal manner can change it. the wizards dont teleport everywhere all the time. mostly because it is a pain in the ass; it can be thought of (and is, sometimes, in the books) manually copying all of the information of all of the participants involved and changing their position properties in some kind of akashic database together without accidentally missing something really important of their body or soul or mind.
we are in this kind of a place.
so when you are mad at your fellow druid scholar-operator of the universe and you just have to have it out, what do you say to invoke the witnessed challenge?
"does the ground suit?"
directly, "do you want to do this here or somewhere else"
indirectly, "are you really sure you want to proceed"
does the ground itself, which of course, of course is a thing that lives and loves and has a stake and a say- does it want what you want? are the prevailing circumstances going your way? is your theory sound and knowledge current?
sometimes even abruptly in: "what you propose is wrong and what i will do is explain to you why but if anyone attempts it i will stop them" which is understandable when many of the main characters can or have done things on the scale of affecting stars that are home to trillions of kinds of lives on our scale.
its delicious. more vulgarly: "my understanding is stronger. if you do not cease being unimpressed by the truth, i will design a little puzzle around the principle set to curse you to smell really bad if you fuck it up in front of everyone"
if you are a dipshit little upstart it can also be an anime style taunt letting everyone know you trust in the raw pew pew of whatever your ley line bullshit happens to be rn. but, you know, hey. challenge has a healthy social purpose. even the utmost defenders of peace and life itself just telekinesis rocks at each other til first blood occasionally about it