War on Xmas
is the fifth and last stage in Christmas Event
Though there are some black and angelic foes, they are not the main issue. The most serious foes are the Duche and Blitzen.
If one has Kasa Jizo, then the Black and Angelic foes are not a problem.
Cheese: if you can get the Blitzen behind the base (because of their high knockback count), then you will start attacking the base head-on, without needing to kill an the Blitzens.