Step 1:Have a high level water mount (plesio, mosa, meg)

Step 2:Lure it to the water with a bow or something

Step 3:Once it comes fully in the water it will deaggro on you

Step 4:It will most likely drown so watch out if you want the xp and not the meat

Step 5:there is no step 5, it will die but will take a long time