Terra Blade

The Terra Blade is a top-tier Hardmode Sword, currently with the highest base per-hit damage of any Sword in Terraria. It auto-swings, and fires a green Sword projectile that costs no Mana or Ammunition and can pierce up to three Mobs.

Its best Modifier is Legendary.

Tips

 * With a Legendary reforged Terra Blade, Fire Gauntlet, Destroyer Emblem, Avenger Emblem, Mechanical Glove, and Warrior Emblem accessories all reforged with Menacing (+4% damage), and the Well Fed, Tipsy and Flask of Ichor buffs, As well as wearing the Chlorophyte Mask, Turtle Scale Mail, and Hallowed Greaves, the Terra Blade will have a base damage of 226 melee damage, making it possible to score critical hits for 600 damage.
 * The Terra Blade deals 13 more damage than The Horseman's Blade, despite being available earlier in the game. The Horseman's Blade can attain a higher damage rate due to its pumpkins that home in on the enemy (however the pumpkins don't attack other players in PVP situations).