The Healing Leaf

At the order of the Secretary, Yurig, a young man from the Kingdom of Dominator, welcomes the saint Sanator, who is coming from the sacred island of Fronds to the world, at the Neutral Zone Cross and goes on to escort him. In addition to Yurig, the escort will be selected one by one from the friendly country Exia, the commercial city Full Goal Union, and the nemesis Abigor Federation. What is Sanator's mysterious and powerful healing leaf !?

source: https://www.mangaupdates.com/series/f21uunb/iyashi-no-ha