"With this, I am ready to open the door," I said as I laid out of the formation in front of the rusted door.
It is the door that takes me to the next place and likely is the door from which I will be returning and also the Grimms that went inside. Like all the seven formations, this will also activate the moment the Grimms step on it.
It is stronger than the seven formations; who knows, the Grimms inside received some benefits and gained some strength; I will need something to greet them.
Now, the only thing I have to do is open the door and go inside, which is a huge risk considering the Grimms that had gone there, and I am no match for them. The whole ruin is filled with the things for which I am not the match.