Children of Mana/The Mana Tower

Children of Mana doesn't really change that much whether you play as Tamber, Poppen, Ferrick or Wanderer. Either the ways you go, deliver the reports on plant activity to Moti, watch the cutscenes and choose as your companion spirit either Wisp (as his healing is good to have in dungeons) or Undine (as her offensive magic is good against the boss of this level when you can hit it).

Boss: Xangar
Watch the cutscene, where you're introduced to the bad guy of the game.

Like all good heroes (or heroines) of mana, you're given the task of checking all the strange occurances out, so you get a new weapon, the Light Flail.

It's highly recommended that rather than immediately going to the upstairs of the Silver Mermaid to continue your quest as suggested in-game, you should instead speak to Tess. This will present you with the opportunity to go back to the Mana Tower and eradicate the monsters there.