Once you have the sharp fang, you’ll need a Chatacabra Certificate (which you should have from the first story mission), as well as two Chatacabra Scales and a Chatacabra Jaw to build the Chatacabra Coil, the later of which you can get by breaking a Chatacabra’s face in te middle of a hung.

Grabbing an Aqua Sac in Monster Hunter Wilds is important early on if you want to craft a water element weapon from the Balahara tree. Since you'll find yourself in the fiery Oilwell Basin before too long,