Grimspire Ascension

The Grimspire has taken everything from him: his parents, his brother, and his future. Now Jethro only has one thing on his mind—revenge.
A deadly tower with over 20 floors of monsters and challenges, the Grimspire popped into existence one day and forever changed the face of the world. No one knows where it came from or what its real purpose is. The only thing known for certain is that to reach the top means to get a wish—any wish. Most people try their luck with dreams of fame and riches, but Jeth just wants to see the wretched tower crumble. The Grimspire’s demise is all that matters to him.
When he is released at the entrance to the tower, together with other freshly-trained Ascendants, he soon realizes the folly of his goal. Within seconds, everyone around him is crushed by terrifying creatures.
As it turns out, his mission is close to impossible. If he wants to have the slightest chance to succeed, he will need to become more powerful than the Lord of the Spire himself.