Title: Triplets Conquered 3 worlds Including Earth

Triplets (a unknown soul in 3 identical body ) , in an fire accident at a local Karaoke bar. One of the triplets only survive however the other two sacrificed. At 15 years old Ronald died then met the goddess Lenneth and told him that their noble action award him for reincarnation to Valesti ( other world) his other brother with the same situation is transferred to Nibelung , Lenneth Sister's own Other world. Ronald our protagonist reincarnated as a prince however after birth he discovered his doom fate . To be sacrificed in his 12th birthday on a untouched dungeon on a dangerous desert named Abyss. The mc just choose crafting skills beforehand. He is screwed not only that he is also manaless. He can't use mana. How will he survive in a desert to reach Abyss. He only have 12 years to prepare.