15 August 2014 at 6:12am
I'm trying to figure out the best way to solve this puzzle for the special achievement with the fewest additional globes.
My solution is predicated on the assumption (not stated in the text) that when you use the frost globe, you can choose which guardian it affects.
I think I can get all four with just an extra frost and tremor globe. My solution is:
Shadow globe on guardian 1, shadow globes on guardians 2 and 3, then the next two are frost globes applied to 2 and 3. After that a tremor catches 1 and 4, then a frost drops 1 back, and a tremor kills 4. After that frost again pushes 1 back, leaving 2 and 3 in front and 1 a step behind. A third tremor hits 2 and 3, and all three will eventually die of the shadow globes before reaching the final arrow.
I don't think it's possible to do better. You need to deal 600 damage all up. The first shadow will deal 100, the next two will deal 90 damage (since they are placed on the second square). The three frost globes will each deal 10 damage when applied to a shadow-cursed guardian. That brings us to 310 damage. Assuming you can use your two tremor globes to the maximum benefit, they do 100 damage each, which brings us to 510. The extra 90 damage could in theory be filled with a frost (10) and a shadow (for 80), but that means that you deal exactly 600 damage, which means all guardians must die on the last square. Further, since all guardians are cursed, each tremor globe must hit a different pair of guardians in order to avoid wasting damage, and may not hit groupings of 3 or more (as there is then less damage total).
Unfortunately, once you stagger your guardians so that you have two in front and two behind, the two behind never run into new globes, new globes always hit the guardians in front. Therefore, in order for the two rear guardians to hit a tremor, the front two have to be killed. We only have 4 frost globes, which is not enough to move the front two back past the rear two (that would require 6). Therefore, the front two must die *before* the last square, which would contain a tremor to kill off the rear two. Unfortunately, since the total damage we can do is exactly 600, the front two must survive to the last square, as they need the extra shadow curse damage. Therefore, a bonus shadow and frost is *not* sufficient, you need a tremor and frost.