Fall of the Giant Tortoise
The fall of the tortoise was a long and arduous one. Reign and the others had fought for over 1 hour against the tortoise and its brethren.
The constant attacks from the Tier II monster and the other ones had made it hard for them to fully focus and commit to attacking one tortoise and breaking its defense, which made the whole fight much longer than it needed to be.
The tortoise had a few more tricks up its sleeve, instead of only using its ability and attacking them that way, it would also occasionally retreat to its shell before using its ability in order to launch itself toward Reign and the others.
The huge tortoise would destroy anything in its path after being launched, but it would simply bounce off if it hit any of the smaller tortoises, making the move one that had no real weakness.
The other tortoises, however, had no such things.