Beckett's Saber

If equipped creature is non-legendary it gets
+3/+1. If equipped creature is legendary, it
gets +6/+3 and has menace and "Whenever
equipped creature deals combat damage to a
player, create a colorless Treasure artifact
token with "{t}, Sacrifice this artifact: Add
one mana of any color."
Equip {3}
Equip Legendary {6}