There are 24 spaces in the outer region and 16 spaces in the middle region, for a total of 40 spaces.
Excluding the Treasure Chamber, Eyrie, and Meeting with Destiny, there are 28 spaces each in the Dungeon, Highlands, and Woodland expansions, for a total of 84 spaces.
Excluding the City Gate, Town Square, Jail, and all of the shops, there are 16 spaces in the City expansion.
40 + 84 + 16 = 140
There are 140 Dragon tokens.
At the start of the game, place one dragon token face down on each of these spaces. When a character lands on a space he flips the token over. If the token is a dragon scale then the scale is encountered according to the normal rules of encountering scales. If the token is a dragon slumber or dragon rage then the token is encountered as if the character drew it, after which it is discarded and the character encounters the space. If the token is a dragon strike then the character simply discards the token and encounters the space.
Dragon scales may only be used to provide a bonus once, after which they are discarded. (This is to offset the fact that all 120 dragon scales are in play.)
A new dragon king is crowned whenever the time card is flipped, simply passing sequentially from one to another.
Edited by Osbo25