Map: Faron Woods
Recommended Element: Fire
Heart Container: Sheik
Heart Piece: Impa
Skulltula: Defeat 1,000 enemies
For your first objective, you have to located and defeat all five Deku Babas in the battlefield. But first, you have to find the Bow and Arrows around the settlement. It's not immediately marked in your map and you need this weapon to defeat the venomous Deku Babas. Once Lana reveals its location, head to the southwest, behind the large tree to find the chest containing it.
Backtrack and lock on the nearest Deku Baba then use the bow. It will only take one shot to defeat it. Do the same to the others. Once done, Lana will retreat to the Deku Tree. Shortly after, Gibdo forces will appear and head for the Tree. Engage them and defeat them in battle quickly.
Once defeated, Wizzro will set fire to the Great Deku Tree, located in the middle of the map. You have to make your way to the northeast to find the Fairy Fountain. The entrance is guarded by a Gibdo. Defeat it to open the door to the Fountain. Head to the Magic Circle and summon the Fairy. She will make it rain and put out the fire on the Deku Tree.
There's also a large chicken inside the Fairy Fountain. (If you're familiar with the Zelda franchise, you know what usually happens when you attack chickens in the game) In any case, attacking this chicken will make an army of chickens surround and attack you. They'll also follow you around. Keep defeating them until Cucoo, the golden chicken appears. This guy's attacks are quite strong (about 3-4 hearts per attack) so evade it and attack it whenever you have the opening. If you're low on health, run away and defeat some enemy outpost captains or scour the other trees for some item to get sure heart drops.
You can now recapture any fallen strongholds and kill large targets to get their Materials. Once done, you just need to head to the northwest and defeat Wizzro. After getting his HP down to critical levels, Wizzro will flee and he'll leave Gohma, a large spider.
Make sure you have your bow equipped. The boss's weakpoint is its eye. However, you can't shoot it normally since its reflexes will allow it to block your arrows automatically with its front legs. Lock-on to the boss and keep evading its attacks. When it fires an upward beam, its eye will be vulnerable for a few seconds. Another chance when you can shoot its eye is when it stops moving and charge up for a powerful attack. Use these chances to fire an arrow and reveal its weak point icon. Close the distance and keep attacking so you can deliver a critical blow. After dealing enough damage, the boss may relocate to the Great Deku Tree, which is your main allied base. Do your best to kill the boss quickly; otherwise, you're in danger of losing your base and losing the battle.
After the scenario, Lana will become a Playable character. The Bazaar's Smithy will now become available as well.