As Kojiro entered the guild house, he took a look around. Hunters of different shapes and sizes, guild liaisons. He went over to a guild liaison and, after looking at the available quests, he accepted a hunt for...

A Diablos. 
[img=http://img4.wikia.nocookie.net/__cb20140101165521/monsterhunter/images/f/f5/MH1-Diablos_Render_001.jpg]
A double-horned monster with a spiked tail that can burrow through the sand.