What are the blessings a man would recite, when immersing in a Mikvah (Ritual Pool) in preparation for a Holiday?

Nowadays a man would not make any blessing at all since he is immersing himself as a custom and not as an obligation as he will not be partaking of sacred foods such as sacrifices. Those who immerse as an obligation recite the blessing: “Blessed are You, L’rd our G’d, King of the Universe, who has sanctified us with His commandments and commanded us regarding immersion in a mikvah.”