The summoner name or tag is incorrect
katsu #0622
EMERALD I
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Match History for Patch: 16.6.1
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Champion Stats for Patch: 16.6.1
Champion Mastery
lvl: 47
493,542
lvl: 39
436,475
lvl: 38
387,900
lvl: 33
336,635
lvl: 31
307,212
lvl: 28
275,263
lvl: 27
271,704
lvl: 26
259,994
lvl: 25
260,301
lvl: 22
211,816
lvl: 20
186,409
lvl: 18
167,269