Kill 3 opponents in one fight using 3 different methods (swords, bombs, crossbow, Signs, etc.).0
I got this at Hangmans hill in Velen where the level 1 dogs are
Run down the hill normally about 5 of them, kill one with sword, a bunch will swarm use igni on ones that will bunch together and should be one left and use the crossbow, took about three shots to kill it.
If you kill them all by accident fast travel back to white orchard and then back and they should have respawned