Blood Brothers is very reminiscent of trading card games. You play as a vampire of your choice (one of the characters shown at the bottom of the banner posted above) and use your necromantic abilities to raise fallen enemies as your allies. I have been playing for about a month and it's been a blast. You can combine similar familiars to create devastatingly more powerful ones, can consume lesser familiars to increase the proc rate on your stronger familiars' abilities, and empower their stats with orbs/crystals you collect throughout the higher level zones. Combat is automated, but your choice of familiars on the battlefield and their positioning within the brigade, do bring some sense of tactics to the fold.
The game's animation is solid and the story while cheeky, does exist. Mobage is adding new stuff to the game all the time as well, including game wide competitive events, player vs player battles, more familiars, etc.
Oh and if you guys want some free stuff, and to help me out, please consider submitting my invite ID after the tutorial maps: 79PJqx. I'd love you guys a lot for that!
Blood Brothers on Google Play