Rolled 12 (1d20)
>>5487728mhmmm. Enough spare for them to consider "trying" to change down, but enough that they will eat floor. Kudos if we can make the floor change barely noticeable, or not noticeable at all. If they spend the second to hesitate then that gives us the chance to shoot them. If they try back pedaling, just use our crystal AoE breath attack to block off their exit, and bad breath them to death.
A slippery floor is nice and all, but it's not at all viable if the enemy choose not to walk down the hall if it looks obviously trapped....unless these guys are berserkers, then they'll probably change down the hall regardless.
Are any of the knights proficent with slings? I'd recommend using those until the enemies reach our position, at it only requires a single hand to wind up a swing, and another to load.
Damn. I wish we brought Tyler with us. I love gunbro and I didn't even make the guy. We should make him something cool, like put a scope on his light rifle.