血刃

血 = 丶 + 皿 : Mnemonic symbol: blood transfusion.

Xu Xian hurt himself and needs to get a blood transfusion in the elevator's bathroom. He found a petal leaf as donor, which is bleeding droplets into a bowl; Xu Xian gets the blood from the bowl as infusion using some tubes.

刃 = 丶 + 刀 : Mnemonic symbol: a (double-edged) two-handed sword.

Robinson Crusoe (r) got a new double-edged sword (刃) and is practising with it in the encampment's bathroom ((e)n4). He starts with cutting his old cleaver (刀), but soon takes the challenge to cut a flying petal leaf (丶) in half.