Spoiler (click to reveal)
I find the Beast Tyrant character very hard to use and control. I understand how it is supposed to work, but play a couple maps where you have to stand on pressure plates, or where the enemies regularly have retaliate and shield, and it is a nightmare. It's so frustrating watching the bear charge headlong into shield 3 or 4 flame demons with retaliate 3.
Or moving it away, only to have the demon move before your next action due to a fluke low initiative and decide to move closer thereby forcing your bear to decided to slam its face into the retaliate wall while completely disrupting the cards you were going to use to command it to attack the OTHER enemy you thought it was going to move toward.
It attacks automatically, doing nothing against high shield enemies usually, then when you command it to actually do damage, it's already taken up to 6 damage from retaliation. It's just too much micro-managing for the payoff. I'd find the bear much more bearable if you could simply choose for it to ignore it's 'summon' turn sometimes.
That being said, it probably has pretty good synergy with a few classes.