He began to deliberately let the Undead Ranger get closer to the Skeleton Griffin Rider, and then succeeded in separating the Undead Ranger into three by walking and turning after being attacked by two arrows.
The three small undead rangers are not enough to be afraid of, so after separating the three small undead rangers from the main force, they manipulated the Griffin Rider to start a double attack on an undead ranger. The double blow refers to the damage of the "flaming arrow" of the skeleton archer and the hammer attack of the griffon.
Under these two attacks, an undead ranger was directly destroyed. Then Adam repeated the old tricks and destroyed the other two undead rangers.
Adam's performance is more patient. He continued to lure through his own operations, luring several undead rangers out of the large army at a time.