I Only have One Skill, But I Can Put A Hole Through The Planet PHTP

A game that could merge reality and virtual together had appeared in the world that Sanji lived in. When one put on the device, anything on the street could become part of the game. Dungeons could be found all over the world where players could fight monsters and craft weapons.
Even the in-game currency was tied with real-world money, attracting even more players into the game.
As a player, Sanji joined the game right away. He chose to become a magician and instantly heard a notification.
“Ding! Please select your magic. Fireball or Ice Pillar?”
When he chose, he realized he couldn’t learn any other magic after that.
“Ding! Your Fireball magic has reached LV 1.”
“Ding! Your Fireball magic has reached LV 10. It can now melt things.”
“Ding! Your Fireball magic has reached LV 50. It can now burn anything to ashes.”
“Ding! Your Fireball magic has reached LV 99. You can now shoot Fire Lasers that are 10 meters wide.”
There was no problem even when Sanji could only use one magic. There was no chanting required, and the magic would only use up a minuscule portion of his mana. He instantly became the strongest to had ever existed in the game.