"Delivery Magic Circle? Go five minutes empty-handed, Principal, can you do it?" Tiguli quietly approached Grey and asked.
Grey shook her head, "I can't even last thirty seconds, so you have never heard of anyone being able to hand-craft a Delivery Magic Circle and get transported. Thirty seconds is not enough for the other end to connect to the Delivery Magic Circle."
Teleportation Arrays can be brief because teleportation is an instant matter, but Delivery Magic Circles cannot be brief, since they are for receiving, needing the sending end to connect first before anything can be delivered.
Anthony had also conjured a Delivery Magic Circle previously, but that was because he had a Soul Contact with Ange, making the speed of position linking fast, which didn't require much solidity; a few dozen seconds would suffice.
Ordinary durations often represent insurmountable gaps.