Previous quests in the chain:
Start NPC: Jorhon
If you're going to be playing around the island, you'll still need to learn how to handle bombs.
Go speak to Kiriya. She can get you up to speed.
WHAT? I CAN'T HEAR YOU!
I'VE WORKED WITH EXPLOSIVES ALL MY LIFE, AND IT'S TIME I PASSED ON THAT WISDOM!
READY TO MAKE THINGS GO BOOM?
THIS ISN'T EXACTLY TELEPORT RESEARCH! JUST HURL THE MAGMA BOMB AT THAT TRAINING DUMMY OVER THERE!
THAT'S THE THING ABOUT A BOMB—WHEN IT WORKS, YOU'LL KNOW ABOUT IT!
KNOWING HOW TO MAKE THINGS GO BOOM IS IMPORTANT, ESPECIALLY WHEN YOU'RE FACING HORDES OF ENEMIES!
NOW GET OUT OF HERE AND KILL SOME STUFF FOR FREEDOM. TELL JORHON I THINK YOU'RE READY!
Kiriya is...special, isn't she? Working around all those loud noises all the time, it's a wonder she can hear at all.
But with her recommendation, I have no problem approving you for duty.
And I don't think it will be that long before you'll need to use what you've just learned.
Report to Kiriya for training in explosives.
Throw your bombs (from your inventory or your skill bar) at the dummies.
Talk to Kiriya.
Report back to Jorhon.