Haki

Haoshoku HakiShanks is capable of using Haoshoku Haki,[22] an ability that only one in a million people can use.[23] After saving Luffy from a Sea King, Shanks was able to frighten it off with a single angry glare using this ability.

Later, while boarding Whitebeard's ship for their meeting, a large amount of Whitebeard's crew (experienced men who have survived in the New World) lapsed into unconsciousness and the ship itself began to take damage from Shanks' mere presence. Whitebeard's men attributed this to his superior Haki.[24]

Busoshoku HakiWhen Shanks and Whitebeard clashed with their weapons, the "heavens" above them split, hinting the incredible Busōshoku Haki that the Yonko had imbued in them.

During the Battle of Marineford, Shanks was also capable of stopping Akainu's magma fist, imbuing Busoshoku Haki in his sword.[25]