The summoner name or tag is incorrect
stormbringer #8429
EMERALD III
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Match History for Patch: 16.9.1
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Champion Stats for Patch: 16.9.1
Champion Mastery
lvl: 40
412,523
lvl: 32
326,214
lvl: 30
305,385
lvl: 25
241,624
lvl: 19
181,108
lvl: 16
189,298
lvl: 15
132,826
lvl: 14
128,021
lvl: 12
106,508
lvl: 12
103,330
lvl: 12
102,516
lvl: 12
100,932