This sigil is a 'raid algorithm'. It coaches you on how to achieve a specific form of offense in such a way that you can attack while being impervious to harm, thus 'raid'. It has many modalities which conform and also approximate it, so even if you can't reach the given standard, you can achieve something similar.
Off-topic, but I'm going to apply for a job at an exchange, a telecom service and another hotel, all near me.
