The story here is that you are accepting hunting missions, fighting and slaying increasingly epic monsters (known as Marks), until you are ready to battle the biggest and baddest monster of all: Yiazmat
Certainly the Onslaught cards are not deep nor do they have a high average power level but none the less the set offers some staples, some nice effects, some key cards in certain places, including some nice tribal stuff and of course great cycling things
While not all of them have particularly high stats that makes them completely broken in combat, they do have some of the most overpowered abilities in the game
Let me know in the comments, or over on the official Draftsim Discord
Popular Decks Amethyst/Ruby Tempo by LunaLove Emerald Emerald glimmers are flexible
Truthfully, it's only held back by the equip cost