Most packs have a pool of 40 to 80 cards in them, but the Master Pack is an exception
Cards similar to Frontline Devastator include Viashino Weaponsmith, Neheb, the Eternal, Manticore Eternal
If you're looking to make Anowon even stronger through upgrades, I would suggest adding more powerful Rogues like Thada Adel, Acquisitor, more ways to generate value through combat like Knowledge Exploitation, and finally more ways to plunder our opponents' graveyards like Mnemonic Betrayal
The deck then adds a number of 2- and 3- drop modular creatures, as well as 4 copies each of Steel Overseer and Arcbound Shikari, each of which can add +1/+1 counters to every creature on your team, and 4 copies of Tempered Steel to quickly make your cheaply-costed creatures enormously strong
Shining Charizard, especially, holds a tremendous amount of value to collectors