Its in-game description reads: "A sword among swords. The strongest of all?"
With its high Lightning and Scale stats, defeating reptilian monsters shouldn't be a problem. It also has a fast 5-hit combo, which means that Monica will unleash her attacks much faster, and won't give the enemy enough time to strike back.
You can find this sword in dungons' chests, or you can obtain it as a Spheda prize in the Rainbow Butterfly Wood's floor level "Something Rare Here!". In the Japanese version, the Ama no Murakumo cannot be found as a Spheda prize.
This powerful sword is a high-tier weapon (Tier 7) : it'll gain 6 Synthesis Points (SP) per level-up.
The Ama no Murakumo can be built up into the Muramasa when you reach the following stats: 135 in Attack, Chill, Lightning and Scale. You must also defeat at least one Joker, Evil Performer and Castle Eater.
Or, it can be built up into the Dark Cloud when you've reached the following stats: 135 in Attack, Cyclone and Smash and 90 in Flame and Chill. You must also kill at least one Castle Eater, Count Balloon and Bundy.
Starting stats (When found or obtained)Edit
|Weapon Hit Points||86||Synthesis Points||2|