Am I Actually the Strongest?

Being reincarnated into another world with the promise of a “cheat” power is one thing, but being reborn as a baby, and then left for dead after your royal parents think you’re powerless? That’s another thing entirely! Now the newly born Reinhardt—Haruto to his new friends—must find his way through a dangerous world…but luckily he’s got magic that’s quite literally off the charts!

Source: Kodansha Manga, Vol. 1