Use the first safe notice, then track objective credit
Players report that the first time one Corrupted Hygos notices you may add target research, while objective work may award research to one corrupted creature present. Treat both as tests, not guaranteed payouts.
Record the Hygos value before the run, confirm the live creature label, compare immediately after its first notice, then compare again after the room objective resolves. If the number does not move, do not repeat aggro or promise that a specific objective will select Hygos.