On the next episode of Mashin Sentai Kiramager, the yellow Kiramai Stone turns into a hammer weapon and Gigant Driller debuts!

Episode 17 "The mansion's rare stone" 8/2/20

"The fierce battle against the Hammer Monster ended with great injury and without being able to completely destroy it! Juuru and the others discuss their current plans on how to handle the Hammer Monster as they return to their HQ, and according to Mr. Hakataminami, the giant mecha form incorporated into Mashin Drijan will be able to do the trick! However, they are unable to get their plan in motion as there is currently no Kiramai Stone to complete the activation of this Mashin! They are also concerned about the fact that no other Monsters have appeared since then... 

Finally, a wounded Takamichi returns to the HQ announcing that he has finally found his treasure! Takamichi says he wants Tametomo to help him acquire the treasure, while Mabushiina says he will be needed more here should the Monster return again! Tametomo however, agrees to accompany Takamichi, and although he has officially joined up with the Kiramagers, there is still some reluctance in him as he refuses to disclose what exactly is this treasure he is seeking..."