The entire group of 15 flew away from that firm almost flat like mountain side, including Osira who was given the honour. Eric and Mogranius were not left to die either, surprisingly they don't see these two Ignites as complete enemies and find other uses on them.
Osira flew higher up the moutain, until she felt like she has a good chance of landing the Ignite Stone at the desired location. At first of course, she waited for her team to reach as far down as possible before she went into action. They saw the detonating force of the super charged Ignite Gem, last thing they need is to a victim of its radius and aftermath.
Clinging on the mountain side with one hand and holding on to the blood red Ignite gem, she took a quick peek at her team and saw them flying down, from the looks of it downwards the neutralized Kingdom. Eric and Mogranius aren't awake, if they were they would be both terrified and amazed of the aftermath.