Secret of the Magi

Level 5

When you imbue a weapon with the rune of the eldritch knight, in addition to its normal benefits, the rune grants the weapon one of the following weapon fusions of your choice: ethereal, flaming, frost, merciful, or shock. The weapon can’t gain a fusion it already has, and this bonus fusion doesn’t count toward the maximum total level of fusions the weapon can have at once. The bonus fusion ends when the weapon ceases to be imbued with the rune of the eldritch knight. For more information on fusions, see page 191.