I was minding my own business on Ragnarok while in level 16. I was building by the rainforest area. There was This Rex who was killing everything. So I built up courage and Stood on a cliff and started shooting it with my bow and arrows. After about 30 arrows I was my bow broke so I panicked and ran to my stuff and took the materials needed and repaired it. When I turned around to go back to shooting it. It was on the cliff I was on. And I almost got a heart attack. Luckily I only needed to shoot it one more time and it died. I also leveld up 2 levels and the Rex was in level 15.