Dungeon.io is simple arena fighting game based on battle cards. Every level you get you can chose one of 3 random cards from your deck and use it.
Open Car Packs for gold to get common and uncommon cards.
Card Pack for gems will give you rare, epic and legendary cards.
You can merge two same cards to get one of higher rarity.
Game is in development and receives updates almost every day.

Recent changes:
v1.98