The [Rune of the FIRST].
Replicus had seen this before.
He had not only spotted it on multiple other evolution options he had chosen to forgo in the past. He had seen it among his own newly acquired abilities as the Warmoth's Progeny as well!
Back when he acquired his abilities, he had gotten a staggering understanding of them all, except the Runes. They were not powers exclusive to him, after all.
However, that said, the use of the [Rune of the FIRST] seemed to become clear as explained by the guidance field.
Perhaps this was why the Null Devil King hadn't countered Replicus' from before, but… the Rune afflicted the one to deal the first blow in a clash. It gave its user a 450% boost to their powers and gave the opponent a six-minute time window to defeat its user, otherwise they would permanently lose half of their powers!
But of course, there wasn't only one activation condition for the Rune.