Towers of Acalia

Thankfully, the spirit who reincarnated me modified my core with a rune of power. Now, each time I ascend to a higher level, I can add a new rune, enhancing my strength. But this gift was given with a condition; if I don't climb and conquer the Towers of Acalia, this new world will fall into ruin. Plenty of obstacles stand in my way: raging spirit beasts, tower summoned monsters, rival cultivators. But by bonding myself to gorgeous women warriors, I can ascend and grow strong enough to take on the seven towers. Gods help anyone who stands in my way. This novel includes elements of lite LitRPG, Isekai, cultivation, and a slow-burn harem.