The Way of the Magic Man

Talk to Parina standing at the entrance to the Temple of Einhasad in Gludin Village.
Go to Ruins of Despair south of Town of Gludio and talk to Flame Salamander . He's somewhere in the area with the most Zombie Soldier, Zombie Warrior, Ruin Bat and Ruin Imp Elder.
You need to return the Key of Flame that was stolen by the spider. Kill Ratman Warrior (level 19) west of the ruins. Return the key to Flame Salamander and he will give you a Flame Earring.
Talk to Wind Sylph east of Gludin Village somewhere in the Wasteland entrance area. She will give you a Broken Bronze Mirror and ask you to bring her something.
In Wasteland, find the Wasteland Lizardman and give him the mirror, and in return you will receive a Wind Feather. Take the feather to Wind Sylph and she will give you a Wind Bangle. All monsters in Wasteland are above level 20 and aggressive, so be careful.
Go to Fellmere Lake northeast of Gludin Village, find Water Undine there and talk to him. He wants you to kill the Quest Monster Water Seer (lvl 17) living on the other side of the river. Kill the Quest Monster Water Seer until you collect 2 Sparkle Pebble (Glitter Stone), then take them to Water Undine. He will give you a Water Necklace.
Go to the Ruins of Agony west of Town of Gludio, find Earth Snake there and talk to him. He will give you a Rust Gold Coin and ask you to bring Red Soil, which can be taken from killed Red Bears (level 14). Bears can be found in the hills south of the ruins.
Take Red Soil to Earth Snake to receive an Earth Ring.
After collecting the Flame Earring, Wind Bangle, Water Necklace and Earth Ring, return to Gludin Village and talk to Parina. She will take the items and give you the Bead of Season (Orb of Change).
Talk to High Priestess Levian in the Temple of Einhasad to become a Wizard (after leveling up to lvl 20).