Goblin at Town Hall 9: max level 6. At Town Hall 18 the cap is level 10. Max level per Town Hall: TH3 2, TH4 2, TH5 3, TH6 3, TH7 4, TH8 5, TH9 6, TH10 7, TH11 7, TH12 8, TH13 8, TH14 8, TH15 9, TH16 9, TH17 9, TH18 10.
Tap a Town Hall to open this item there. Dashed: not available at that Town Hall yet.