The armor type monsters have power and they are absurdly skilled with the sword as well, but their legs are slow.
Also, the armor is heavy and it should sink easily into the mud.
Even though I say that, if I don't release a deep-set [Quagmire] then there's the possibility it might escape, as well.
I don't think it will lead to a cave-in so easily, but it's still better to minimize magic that changes the terrain.
About to the knees, I guess.
"[Quagmire]!