My first official game at the con was 1500 points no terrain Marcus' Umenzi vs my Monsters and Mercs. I decided to be a bit whimsical and try to fit a Hydra in there. My build was:
1 * Hydra (600) = 600,
3 * Wildmen Swords (142) = 426,
2 * Wildmen Horse Archers (214) = 428,
3 * Pile of Loot = 45,
for a total of 1499 points
As I recall Marcus had a couple of premade builds he could tweak if he needed to play the odd man out in addition to judging. I think it had something like:
1 * Chosen (381) = 381
1 * High Priest (130) = 130
1 * Shaman (100) = 100
3 * Umenzi Warriors (153) = 459
3 * Umenzi Spearmen (170) = 340
For a total of 1487 points
I put the Hydra on my far left flank with Wildmen Horse Archers to keep it from getting pinched and tried to concede the the middle and right flank as slowly as possible with the Wildmen Swords. Marcus countered with Chosen on my weak right flank (and Possessed swinging around for a possible pinch) and it was a race to see who could roll the line quickest. The initial result was utter disaster for me. My Wildmen Horse Archers do their standard "Get In Your Face" on some Umenzi Spearmen who Final Rush, nut up, and one-shot my unit. Luckily, the two units to their right had not engaged yet, but not so luckily they were only in range to FR in with the flank. So I had to choose between a big smoking hole in my line or spending a CA or two and get the following picture:
Note: the Wildmen Horse Archers to the left of the Hydra and the green command card are dead.
What follows is a bit of a blur, but I can say two things about what happened next. Firstly, I have an impression of the dice on both sides for good or ill giving far from expected results far more often than one could reasonably expect. Also, I remember oscillating between "I got this" to "It could go either way" to "I am screwed" about 6 or 7 times. Meanwhile, the Hydra massively profits from the chaos. The Wildmen Swords (with the help of generous spending of blue command cards and Orderly Retreat) have choked off the amount of units able to gangbang the Hydra.
The eight blurry orange circles on the Hydra card are eight extra heads!
The final result is a battlefield claimed by the Hydra with one red box!
 I am fond of taking Wildmen Horse Archers in part because they can claim a lot of map and then nerf a spear unit's cav bonus by stopping short and shooting them in the face. The spear unit either has to Close, losing most of its bonus, or get shot in the face again.