Use it as the centre of a horror sequence: open with Danger Alarm Meme Sound to build tension, let this clip deliver the false cure, then cut to FNAF Jumpscare Scream for the payoff.
About this sound
This clip gives you SCP-049 in just over two seconds: a beaked doctor speaking in a low, even tone as he claims to be the cure. The delivery feels polite and certain, which makes it unsettling, because the character behind it kills with a touch. It comes from SCP: Containment Breach, where he hunts for a pestilence only he believes he can heal.