Basil

Basil is a character unique to the Nintendo port of Ultima IV. He is a mage loitering outside of the Healer in Moonglow

Description
Basil claims to have a mysterious secret, but will not initially reveal it to the Stranger. After speaking to him repeatedly, however, he will instruct the hero to search at 149, 46 when both moons are new - a location which bears fungus under such conditions.