I played secret dragon paladin and got crushed and dropped all the way down to 20, . I've not been to 20 in ages lol. Like my draws were so bad, no matter what I had all of 5 secrets in my hand. On paper it should have worked but nope. I like juggler/templar combo but the deck performed horribly.
Cut the secret stuff, played a more midrange deck but still I have 2x pyro 2x eq and a doomsayer. I guess it's not that midrange. It crushes zoo really easily but not sure more than that how good it is.
Book Wyrm is ok but what's more useful is the historian. You can keep guardian, play this get another dragon for your guardian activation. It's its main purpose, extra value is a bonus. Nice card. Got Alex from it and sneaked in a win, maybe Alex is actually good to have in a deck instead of Ysera I'm playing right now. You can reliably get a big guy from them, maybe you can afford to not play any big dragon at all.