One of the fixes to the potential burnout problems they have is to add more to the game - which is likely to drive in-app purchases as players pump money into booster packs
Flip 5 coins, the more heads the more damage your clan does
Price Guide or Value List : Have a price guide or a list of estimated values for your cards
An indestructible boss like Prime Material Dragon is a similar example, able to spell trouble for smaller decks that rely on destruction effects to remove bigger threats, such as this deck, Gladiators, Gadgets, Gravekeepers, or decks looking to abuse Ryko or Spy
Not to be outdone, Revavroom ex, Melmetal ex, and more Pokmon promise to change the course of battle in the Scarlet & Violet - Obsidian Flames expansion
Theres also some useful vampires that can support the deck even if theyre not knights, and some knights that can be turned into vampires through other cards