1.) Attacking models in based entirely on Line-of-Sight:
One of the most commonly confused rules changes from the Mk I to Mk II split has to be the shift from a 2D game with 3D models to a truly 3D game.
Line-of-Sight (LoS henceforth) is now based entirely on a model’s volume – if you can draw a line from any portion of Model A’s volume (in its volume’s front arc) to any portion of Model’s B volume (without passing over terrain, a model of equal or greater base size to Model B, or an LoS blocking feature such as cloud effects) – then Model A can see Model B.
In plain english: If a straight line can be drawn from any part of the front arc of you model’s base to any portion of another model’s base without going through LoS blocking terrain, cloud effects, or a model of equal or less size – you can attack assuming you meet the range requirements of the attack.
This leads to odd siutations. For instance, its intuitive to assume a model with Reach must be able to draw a 2″ line from its base to its another models, without crossing the base of another model, in order to attack it in melee (i.e. – you have to have a “unobstructed line of attack”, as a local player calls it). To give a specific example:
Let’s assume a group of Mechanithralls have all but surrounded your Templar warjack. The Mechanithralls’ commanding warcaster is within 2″ of the Templar, but the only portion of its base within 2″ of the Templar can’t have a line drawn to it from the Templar without crossing a McThrall’s base. That said, a line can be drawn from the side of the Templar’s base to the back of the warcaster’s base without crossing a Mcthrall’s base. The question is: Can the Templar attack the warcaster or does it need to kill some Mechanithralls first?
In Mk I, the answer would be the latter; however, in Mk II, its the former. The only requirements for making melee attacks are having the target within range (in the above example: check) and having LoS (in the above example: check). See pg. 50 in Warmachine: Prime, paragraph 6 in the left column.
How many of these have you been guilty of, even after 6 months under Mk II? What other hold overs from Mk I do you see in your group? People still lining troops up in perfect lines for Shield Wall? Forgetting about Shake Effects? Let’s hear it!