Usually, when something is proposed, the hidden clans would make arguments or participate in discussions, trying to get clarification on the matter of how such implementation of the act will benefit them or the world.
But, at the moment, all they could think of was that giant undead army they saw in Azzy's mindscape earlier and Azzy's promise.
Azzy also knew how selfish these hidden clans were. They hold themselves on high moral ground, but in the end, all they care about is dominance. WAMO even suspects that some of them actually have secret connections with other civilizations from other star systems, as they have spotted interspace travel from certain locations of Gaia over the past few centuries.
Azzy doesn't know their secret, and neither does he care about it. They have greed and appetite to grow stronger; that's all he needs to know. Hence, he wasn't that worried about a complete rejection of his propositions and calmly waited in silence.