Everlasting Talisman

You attach a blessed talisman to one weapon. The weapon becomes infused with the enduring vitality of Wood. For the duration, the weapon gains a +2 bonus to attack and damage rolls. If it is already a magical weapon with a bonus to attack and damage rolls, this bonus increases by 1 instead. This weapon cannot be destroyed or damaged by nonmagical means. If it is destroyed by magical means, it returns to its original form at the beginning of your next turn and the talisman is immediately destroyed.

Once on each of your turns when you hit a creature with this weapon, you can cause pale branches to erupt from the point of impact. You choose another creature within 10 feet of the original target. The branches pierce through that creature, dealing 2d8 piercing damage.

The talisman is a tiny object that can additionally be destroyed (AC 24, 5 hit points), immediately ending the blessing.