Sherean Leviathan. This creature is an absolute annihilator, and by my guessing, my opponent will pretty much just finish what he's doing and put everything he can on this monster. My dad hates it when I bring out powerful creatures during our games, but I'm gonna put him into a real panicked frenzy with this one.
Kraken is also another beauty, the only problem being that it's slow, and enemies can easily just run away from it if it gets too close. Nonetheless, Kraken can be very effective if you place him right.
In terms of attacks, I'm really excited to try tsunami. Everything about is music to my ears, but I was expecting 4 dice instead of 3.