Strength of one

Strength of one was an alteration spell that gave each member of a small group of lawful humanoids the combat strength of the strongest member.

Realmslore
Alaghor, priests of dwarven deity Clangeddin Silverbeard, possessed this spell as a specially granted power, as did the halfling trueswords, priests of Arvoreen.

Strength of one was included in the Ilmatari Tome of Torment.

Paladin Denton Crimsguard from Alaghôn was granted this spell as a special power by his patron Tyr around 1370 DR.