This is a delivery request from Kagero the Merchant at the marketplace. You can receive it after finding the spot where Lava Caverns Sub-camp 2 can be built.
|Kagero the Merchant||Deliver 1 Tetranadon Hide and 2 Monster Bone L||Lava Caverns Sub-camp 2|
Where to Find Tetranadon Hide
No surprise, Tetranadon Hide can be obtained from Tetranadon. You can fight Tetranadon in the 3-star Village Quest, Can’t Stomach the Thought. If you manage to break the Tetranadon’s arms, you’re guaranteed a Tetranadon Hide. Otherwise, it’s fairly common.
Where to Find Monster Bone L
Meanwhile, Monster Bone L can be gotten by hunting Somnacanth, Rathian and Pukei-Pukei. It’s also given out as an uncommon reward for multiple 4-star and above Village Quests, plus 2 and 3-star Hub Quests. Perhaps the quickest way is to accept the 4-star Village Quest, Infernal Lacrimosa, where you can hunt Somnacanth and Monster Bone L is a potential quest reward.