Undertaking an impossible task with the belief that one will certainly die, examples of such can be found on the Black Prison Battlefield, and Zheng Qing could easily recall many.
For instance, the multi-armed giant KOTOS, upon charging into the battlefield, sacrificed himself to summon a colossal willow tree that blocked the wizards from repairing the shattered outer fortress walls, while weaving countless spreading willow branches to create a green sea covering the Keiform Flight Land, forcibly opening a living ground for the Demon Alliance Army on the wizards' home turf.
Then there are the Mouse Fairy Couple, who, despite there being only a trace of juice left from their body, gave their all to save her, resulting in one being completely annihilated and the other losing their physical form.
