What phrase can be an opposite of 'Achilles' Heel'?

“Achille's heel” originated in Greek mythology, and refers to the only part of Achilles (who was mortal) that was not dipped in the River Styx and so was vulnerable to attack. It was his “weak point”. Consequently, the vulnerable aspect of a person is often referred to as his or her “Achille's heel”. read more

Opposite his"Achilles heel," you might say"his forte," or"his strong suit.". Since"Achilles heel" refers to vulnerability, you need an expression that indicates strength. Make one up, if you want. read more

I would consider strong suit as a figurative phrase like Achilles' heel to convey the opposite meaning. There doesn't seem like an antiquated-sounding or mythological phrase for a strong point. Another similar phrase is long suit but it is less common. fig., as (one's) strong suit: something at which one excels. read more