Set on 4-5 horizon.
Compared with 4th vertical set, it is better by less splitting, larger linking space and etc.
You should learn it by not logic but heart.
Green is not settled still, but you should not cut green because there are two greens.
How to learn death tower #3 ～"Settlement" and "Cutting"～ - phoernianのブログ
You can select primis tower or tertium tower.
