He called it the Call of the Harvestor and if it worked, the heart of Diodora would be in his hands. Of course, if it went wrong he could end up with his heart out of his chest so caution was advised. That was why he had to be cautions as rushing into rituals was dangerous.
Have him use power boosting card on nzt pills and make it a permanent one then he doesn't have to wait for genius characters to assimilate or wait at all