[1.004-1.01] Life/Death magic against dragons
There are two simple ways to defeat Clambercoil/Ashwake Dragon before season 50. First is Life magic: Shrink and Growth. Second is Death magic: Blindness and Curse. Of course you can easily defeat other monsters too with Life or Death magic. Hero levelling is most important part of game. So the only viable way to play is using Life or Death magic. It leads to one-way playing that is boring. Also when you defeat most powerful monster so early, you lose interest to continue playing, because other aims are less challenging. Imho Life/Death magic is overpowered.
[1.01] My Lady Irane defeated Fell Dragon on season 50. Save before the battle.
Video of the battle:
Update: Fell Dragon is defeated 1vs1 without using summons on season 56. Save.