Autumn's Sword

The first time you cast a monocolor spell of
each color, but a color counter with that
counter onto Autumn Sword.
Equipped creature gets +X/+X, where X is one
plus the number of color counters on Autumn
Sword and Hexproof from each color for which
Sutumn Blade it has a color counter on it.
Equip {2}
"A land with no iron is not a land without swords,
but is is one with more exotic blades."