((Hero point is spent and doubles Cersei's statistics; there's a mechanic that a Hero Point and a character point can't be spent in the same round, which I didn't mention because it hardly ever comes up, but Cersei is enthusiastic. It's also unnecessary, because the Hero Point ought to be enough.))
((The monster can't realistically Dodge, given you're leaping right on top of it and it was just circling to actually see you when you leapt (said circle bringing its eye into Koh's view, incidentally). Instead, it will flail two large tentacles at you, if it gets the chance.))
((Cersei's using 3 skills: Climbing/Jumping to leap to the monster, Melee Weapons to attack it, and Energetics to affect the mine cart; I'll figure her dialogue is a free action, so her multiple skill penalty is -2D. The Hero Point means all her personal statistics are doubled. So let's resolve each one in turn.))
((She has no specific Climbing/Jumping skill, so it defaults to 3D Strength, doubled to 6D, -2D multiple actions, 3, 4, 6, 2 = 15, which is adequate for that particular jump.))
((She has 5D Melee Weapons, doubled to 10D, -2D multiple actions, 3, 3, 2, 3, 2, 2, 5, 6 = 26, or over 2.5 times the difficulty. Damage is going to be 3D Strength, doubled to 6D, +1D+2 bastard sword, +2D Empowered Weapon effect, 4, 5, 5, 6, 1, 4, 2, 4, 1 +2 = 34 flaming damage for it to try and resist.))
((She has 2D Energetics, doubled to 4D, +1D amulet, and I'll go ahead and give +2 for a quick ritual just before she calls out to Koh, so it's 5, 6, 1, 3, 3, +2 = 20. The spell difficulty is 15+modifier for size, and yes, the mine cart + Chay is pretty big, but on the other hand, it hasn't picked up a whole lot of speed just as yet. She's stopped the movement, and can keep it stopped for as long as she wants to maintain the spell (let's see how the round plays out). But Chay should be gotten, because he's vulnerable and has no cover to speak of where he is.))
((She doesn't have any Parries or Dodges declared, but her Strength this round outweighs the monster's, so she could just weather any assaults. That is, unless the monster spent a Hero Point...))
((In this instance, for Koh, it's two actions: throwing the knife and beating feet to Chay. That would be Thrown Weapons and Running (which will break cover, but the monster has other things on its mind right now). Dexerity skills control the accuracy, but Strength controls the power of the thrown weapon. 4D+2 Thrown Weapons, -1D multiple actions, 3, 5, 6, +2 = 16 to hit. By the called shot rules I posted, an eye is 1-10 centimeters in size, so the standard difficulty of 10 is added to with 4D: 2, 3, 4, 1 = 10, so the difficulty to hit the eye is 20. He hit the monster in the face, but missed the eye in specific. Throwing blades are small enough, their damage is only his 3D Strength, 6, 5, 2, reroll 3 = 16 damage. And no Running skill means the roll defaults to 4D Dexterity, -1D multiple actions, 6, 5, 1, reroll 3 = 15, which, over reasonably smooth terrain with only one major obstacle (the monster itself), is enough to reach the mine cart by the end of the round.))
((Monster rolls to resist Cersei's damage, and burns its last 2 character points for extra dice, but can't quite manage. Given it's 5D Strength, it isn't hampered by Koh's knife embedded in its cheek, though, sorry to say. But more on that in the color text...)
The thing swung around to fix on Cersei, but she was already in the air, and as she landed, she drove her long blade deep into the center of the thing. Cersei was aware in the corner of her eye of the spinning flash of Koh's blade, but she was focusing on her sword and on reaching out mentally to the rolling mine cart. Tentacles flailed around her, grabbing at her legs, her clothes, but she pushed harder, and the blade bit deep until the creature's scream echoed ear-splittingly through the chamber.
While Koh reached the cart, grabbing it by the hand brake and gazing at the prone, broken-looking man who, amazingly, blinked back at him, Cersei found herself holding on to her bastard sword's pommel just to keep her footing as the monster lurched and stumbled, its various tentacles seeming to lose coordination, some failing, some trying to move, some just going spastic. She finally rode the creature down as it collapsed and rolled on its side, allowing her to jump safely to the floor as she felt the last of her adrenaline fading. Bright red blood gushed out from around the edges of the still-embedded sword, pooling around Cersei's boots.
((There doesn't need to be another combat round; the creature is Mortally Wounded, and its only a matter of time before it expires. It won't be attacking again. If you're going to take an action against it, though, we'll continue combat structure for convenience's sake.))