Earthlock: Festival of Magic

Story related, cannot be missed.

You need to save Frogboy from the Varluk Drooh and once you've defeated him, you'll obtain the Hopper Artifact. Return to the Onurasi statue in the hallway and use the Hopper Artifact on it. You'll learn that you now have the ability to warp, so select "Warp to Plumpet Island" and the trophy will unlock after finishing the conversation with Frogboy.

List of the Varluk Drooh's Attacks:

• Droogo Slash: Attacks one ally with a blade of air produced from his sword.
• Dual Strike: Attacks all allies with a blade of air.
• Droogo Fire Blast: Attacks one ally with a fire blast from his gun (can inflict Burning).

Boss Fight Strategy: Varluk Drooh

Varluk is very strong and if you have the Haste and Adrenaline Rush skills those can prove extremely useful in this battle. If you haven't learned these skills you can do this strategy instead. Every enemy has a weakness and Varluk intends to attack with physical attacks the most. The first thing you want to do is quickly kill the Droogo Shaman so you can focus your attention on the main boss. While doing this, have Gnart focus on casting Regen on the ally with the lowest health. After the Droogo Shaman is defeated, have Olia Change Stance into Veteran. This will enable her to counterattack any melee attacks. Whenever Gnart's turn comes up again, have him rest to restore Amri to refill the Regen casting for his next turn. As for Amon, keep him on his thief stab stance and do not bother using the Throw Sand ability. Varluk Drooh is immune to the Blind status effect. At this time, Olia's turn should be coming back up again, so have her use the Taunt ability or heal with a Healing Balm + if needed. If you cast Taunt, Varlik will always be forced to attack Olia and she will counterattack every time she's hit (keep Regen on her so she stays alive). Rinse and repeat these steps until he's defeated and whenever you have the chance to use Gnart's Mage S Bond ability, cast Regen S to restore health to all allies to the party. When Varluk Drooh is defeated, you'll get the Ammo Master Recipe which you can use later on Plumpet Island.