Healer at Town Hall 6: max level 1. At Town Hall 18 the cap is level 11. It unlocks at Town Hall 6. Max level per Town Hall: TH6 1, TH7 2, TH8 3, TH9 4, TH10 4, TH11 5, TH12 5, TH13 6, TH14 7, TH15 8, TH16 9, TH17 10, TH18 11.
Tap a Town Hall to open this item there. Dashed: not available at that Town Hall yet.