The seven different way's you have to die for this trophy are as follows
Drown in water
Fall into lava
Fall to your death
Die from fire
Killed by an enemy (this can be any enemy)
Sink in mud (Pools of ancient dead level)
Running out of time (Haunted ruins level)
You can simply die in the stated ways and quit out of the level to go to the next death you do not need to finish the level.