A Verdant Sword is a Light Blade-class weapon that appears in Golden Sun: Dark Dawn. It can be randomly forged by bringing a Quality Zol to the blacksmith at Champa, Obaba, making it a late-game-exclusive item. It does not have as much of a potential for high damage output as the Tisiphone Edge — but since that weapon can only be found in the postgame-exclusive Crossbone Isle dungeon, the Verdant Sword has far more opportunity to pull its weight for the party. It is a "pure-element weapon" that treats its normal physical strikes as aligned with the Jupiter element, and all four of its possible Unleashes are based on Jupiter as well, making it ideal on the Jupiter Adept Karis. Its signature unleash, Emerald Blitz, is useful for consistently applying a x2 damage multiplier and an attempt to Seal the target's Psynergy whenever it procs, compared to the likelihood of other "ultimate-tier" Unleashes varying between merely x1 damage and a much higher multiplier. Similar to the cases of all other high-tier weapons, its other three lesser unleashes can be randomly chosen in place of Emerald Blitz and can include the particularly unimpressive Gale Force. However, its Vorpal Slash unleash can strike multiple adjacent foes at a time, and its Mad Zephyr unleash has its own chance to double the resulting damage.
...that the Pyrodra is the only enemy to change its elemental weaknesses and resistances between the GBA and Dark Dawn generations?
...that the Darksword, being the weapon with the highest attack rating increase in both The Lost Age and Dark Dawn (210), is the best weapon for any adept using only the Quick Strike Psynergy to be holding?
...that most weapons in Dark Dawn having multiple unleashes makes them have lower average damage results than in The Lost Age, therefore making the Quick Strike Psynergy all the more practical?
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11/24/2018: Datamining for Super Smash Bros. Ultimate confirms a total of eight Golden Sun-related Spirits, an Isaac-themed costume for the Mii Swordfighter, and both music tracks returning from previous Smash games.