Re: is brain freeze good?
brain freeze is probably the best/easiest heroe to play. Build a pets deck
cat lady, chicken/fire chicken, zookeeper, fish imp, dolphin, kangaroo, locus swarm, pogo bouncer, nibble = all easily accesible non legendary/super rare
If you have add any of following super rares/legendaries: yeti, maniacal lauugh, sharktronic, gravedigger
Basically you'll use cat lady until you can biuld something strong with zookeepers.