"Is the lock that this key corresponds to here? So, the Heart of the Earth is here?"
Shard speculated, but there was no keyhole on this door, so the key was useless. However, there were four hexagonal depressions on the door that looked like stone or gemstone.
"Four stone keys? Why is it always this kind of mechanism?"
Shard muttered.
[Do you prefer five keys?]
"No, no, four is fine."
He placed Mia temporarily on the ground, then rolled up his sleeves and reached out to press against the door:
"Fossil to Mud!"
The stone under his palm indeed turned to mud, and Shard quickly extended his hand into the stone gate. But in the next moment, a huge force came from the door, and the unprepared Shard was flung out. He flew five or six meters away before falling to the ground, rolling several times before stopping.
"Oh, that's quite a force~"
"Meow!"
