seriously, help me I can't stop playing it oh god ;_;Puzzle & Dragons is an ios/android puzzle RPG. It plays like a cross between Bejeweled and Pok?mon. It's completely free to play, but has premium features through purchasable "magic stones," the game's premium currency (which can also be obtained occasionally as rewards in-game), which allow increased inventory, pulls from a rare egg machine, and more.
You can control monsters from lowly slimes to mighty dragons to even gods like Bastet, pictured above. They all have different stats and skills, allowing you to customize your team for any number of purposes.
If you're interested, there's a really useful database of monsters and game info here:
http://www.puzzledragonx.com/A tip for new players: At the end of the tutorial the game will give you one free pull on the rare egg machine. It's best to "scum" this pull and start over (by uninstalling and reinstalling) until you get something that's really rare, like a 5-star beastie or a god. Great starters include Ancient/Chaos Dragon Knight, Isis, Horus, Great Valkyrie, Amaterasu, Bastet, Odin, and plenty of others. Feel free to ask!