The summoner name or tag is incorrect
nightmare040 #na1
IRON I
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Match History for Patch: 16.10.1
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Champion Stats for Patch: 16.10.1
Champion Mastery
lvl: 4
21,305
lvl: 4
20,968
lvl: 4
20,712
lvl: 4
18,309
lvl: 4
17,001
lvl: 4
14,876
lvl: 3
9,774
lvl: 3
9,727
lvl: 3
9,258
lvl: 3
8,280
lvl: 3
7,944
lvl: 3
7,033