The top picks not in lane to counter 瘟疫之源 include 岩雀, 不灭狂雷, and 死亡颂唱者. These champions are all good at countering 瘟疫之源 with high win rates over 55%. Even if these 瘟疫之源 counter picks are not used in the same position as you, it's not smart to play him into these matchups. They will most often destroy 瘟疫之源.
Conversely, if the other team choses either 迅捷斥候 or 潮汐海灵, you should seriously think about choosing him, as he easily wins against these champions with win rates over 56% against both ofthem.
methods2.text1
methods2.text2
methods2.text3
otherMatchupsDescription