Felen Combo v0.6.6 (added deck info)

This deck is a medium-speed combo deck. It will be midrange. It is extremely weak to some cards, but generally works well. This deck has two ways to win:
Plan A is At Any Cost.
Plan B is buffed by Champion of Cunning.

Grand Builder chooses Shadow, and one of the goals is to get Shadow's influence to 8 or 12. At Any Cost it can do 12 points of damage, but it can also do 24 points of damage with Prodigious Sorcery. 8 power is required to play this combo.

At Any Cost is easy to play. You can draw it later with Prodigious Sorcery. Discover Talents is used because it has many spells, and with 8 Power, it can do 12 points of damage At Any Cost. Don't forget that Furious Accusation can also be played on your opponent for 3 points of damage.

Notes.
Blackhall Warleader can be changed. if it is to be changed, it is better to use a 2 Power unit. Forbidden Research is not adopted because of its poor cost performance; Grand Builder can reach 12 Shadows faster. Also, Grand Builder is a unit, so it can be used as a wall to buy time.

Have a Fun!