I had a player, many years ago, that played a Minotaur in my world back in 2e. When he started, he was a slave that was rescued by the other players. After about 6 months of play the party had a vast amount of wealth and had made it to a large city. The Minotaur wanted to make a few upgrades to his physical appearance that would help him in battle. He took what was the equivalent to 10,000 electrum pieces to a mage to have his horns coated with the metal and once that was done had him engrave ruins of lightning on them. This have him an added electrical damage to his attack with his horns. He also had the mage engrave ruins of haste on his hooves so he would have the advantage of extra attacks. He then figured that if he charged he would not only have 2x damage, but also have the electrical damage as well.
Those are super valuable upgrades for what sounds like a very heavy melee character. That sounds so epic as well, and those first few combats where it was released were no doubt the stuff of legends! Imagining the gleam off of the horns, and the electricity crackling off of them as well, so good! That said, as a DM that would be one hell of a power shift for the character and would make balancing shift in a very notable way. Definitely allow for some way more powerful monsters to step into the campaign that's for sure.