Hero Realms
How many cards are in the Dragon's starting deck at each party size?
A reply confirms these counts, and no designer post is among the sources.
- raphaell7 · Community · 2018-07-17
The Dragon starts with 10 cards against one hero. It adds cards as the party grows: 12 against two heroes, 14 against three, 16 against four and 18 against five.