Note: THIS POST IS OUTDATED. The design has been improved upon and replaced by the defense located at: http://forum.kingoft...d-v2/?hl=darkon
Base 21 is one of the strongest layouts by default because it has access to three traps and three "environmental" traps: two wooden platforms and a dead end. It is because of these environmental traps that many designs for Base 21 revolve around precision jumps—one false move and you fall to a dead end and are forced to restart.
I have seen a lot of variety in the platform placement, but not a lot of variety in overall design. Most of the designs for Base 21 I have encountered fall under three categories:
A- Dual platform and the door in the right half of the base with the chest in the left half
B- Dual platform, the door, and the chest all in the right half of the base
C- Dual platform and the chest in the right half with the door in the left half
The most unique defense I have seen for this layout is the door on the left, chest on the right, but with staggered wooden platforms in the connecting hall that force a trick jump (catching the second platform from underneath via the corner of the wall to allow for a jump off of the second platform and into the chest). I have, though, seen this defense and its variations a lot—this makes the layout to be a unique design but also not very uncommon anymore.
The following is my Base 21 design that is very unique, fresh, and can be quite difficult. I won't go so far as to say it is the "best" defense possible for the base, but I will say that it is certainly the most difficult I have ever had to save here—and I have saved every single Base 21 layout I have ever seen. I guess you could say I am infatuated with Base 21.
Anyway, here is my design. I will give cookies to anyone who records a video of them saving it, because I really don't want to spend hours again trying to record it—it might take days before I can get a video of it in the thread, but maybe one of you pros could record one more quickly. I had a lot of fun designing this, and really tried to make it as unique as I possibly could. I would love to find a more effective placement for the spinner, but it does serve a very special purpose in its current location. It can be three-starred more easily with potions, but, so can all bases, and they will not help as much as they do on other designs for this layout; Even with potions I have yet to be three-starred, and it would be truly rare to even get a one-star clear.
Edited by Darkon, 27 July 2018 - 01:15 PM.