Sucking up to the five Sword Embryos might sound funny, but it was the conclusion Fang Xing came to only after careful thought. It was not possible for the altar to be opened from the outside, which meant the five Sword Embryos had to come outside on their own—cultivators who wanted to obtain one had to entice them until they came out willingly.
It sounded rather surreal, but it was more reasonable when one considered these so-called Sword Embryos were in fact intelligent beings born from the weapon. The Sword Embryos had their own sentience and even thoughts to the point they could be considered a spiritual being, and as spiritual beings, it was possible to communicate with them. As for why these altars were like this, it was simple: to prevent cultivators from taking the swords using outside power. If a cultivator wanted the Sword Embryo, they'd first have to communicate with it and convince them of this.