Merge pull request #513 from waveney/wav18

New Boost (Now Where Was I) and fixes
Castle Tool better clarification

also changed NWWI unlock
Fast Forward was broken
Fixed locking prizes giving prizes
Bag of Nerfing
Shadow Dragon greedy/generous text

#508
Impervious Ninja unavailable during lockdown

#516
some puzzle progress
further puzzling
puzzle stuff, AA fix
more puzzles
Issue #517