Agate chased down the corrupted gem with his mace in hand and following the other two gems with him. Agate smashed a falling boulder and jumped through the dust and landed on the rocky ground with a roll.
Agate never liked fighting, it was exhausting and feels like a waste of time even though he couldn't get tired in the way most life can and he has all the time in the world to waste, but it still feels that way even if he thinks about it. Agate only fought because the others do, and he wouldn't feel right if he stood and do nothing.

He pulled out a second mace from his gem as he seen the corrupted gem shoot tar at them so he smashed them into the ground to raise parts of the earth to block the the gooey tar aimed at them. Agate heard the monster screech and the sound of something landing behind them, another gem. not one of the three that entered here, and doesn't seemed to be parasitic, were they made here like them. 

Agate simply nodded in agreement and broke off off the top of one of the newly risen earth block and launched it at the monster barely missing it.