Even though there were 2 attackers, he easily dealt with them while protecting the kids with him.
Yang could see how fast the zombies were attacking, so he was sure that he couldn't fight those by himself.
Even though the baby zombies were fast, Luciel could still block their attacks and even attack them properly.
He finally saw how strong Luciel could be, and he was sure that he was even stronger than what he had shown because of how easily he dealt with the two baby zombies.
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When Luciel got to where Samuel was, he saw that they really prepared his bathing area well.
They even enclosed it with the fabrics that they weren't using.
Samuel also prepared two tubs full of water, knowing that he always used a lot of water when bathing.
Samuel surely called another person with water superpowers; that's why they could immediately prepare water for his bath.