The Sworn Sword

Whenever you equip The Sworn Sword, if equipped creature is isn't modified, it gets a +1/+1 counter.

Whenever equipped creature deals combat damage to a player, bolster 1, then proliferate.

Whenever Lachlan, Kiwi Warrior leaves the battlefield, reveal The Sworn Sword and shuffle it into its owner's library.

Equip {3}

Equip human {1}