Danmachi Fic
MC is an old British Aerospace engineer
Random selection of world and rewards.
Knows nothing of the world he is transported to.
Read fantasy as a kid and took up fencing and HEMA in university. Knows a thing or two about weapons handling.
Reincarnation bonus:
Soul Forge: like from custom made demon king. Takes all kinds of materials. Spits out what you want(if specified) or a random item.
Joins Vesta familia