Originally posted by Unholy:

i bet ive killed at least 40 certlings and have not got a trophy head yet. Am i unlucky or can you no longer get them ?

Best method for getting the trophies is a passive one. If you aren't digging out around the fire jets to where its just water around the jets where the surts spawn, do so. That'll auto kill them when they spawn and you can just go every once in a while around those spawners and collect the drops. Eventually you'll get trophies. More you check the spawns the more your chances for em.

Thus no need to actively try to kill them so to speak.