Toxic Flask

The Toxic Flask is a Hardmode, post-Plantera magic weapon that has a 2.5% / (1/40 / ) chance to be dropped by Dr. Man Fly during the Solar Eclipse event. It throws a flask with low velocity and a heavy arc that explodes on impact and creates a spread of small toxic clouds that constantly damage enemies, even through blocks. The clouds last for one to two seconds.

Tips

 * The Toxic Flask has the potential to be an extremely powerful weapon for a wide variety of purposes. Depending on the situation, the from the toxic cloud can exceed that of the Inferno Fork, the Shadowbeam Staff, and most other Hardmode Dungeon-tier weapons. As long as you can support the high Mana cost, it is one of the best choices considering that it is available shortly after Plantera.
 * While the Toxic Flask excels against crowds of enemies, it is usually less effective against single resilient enemies like bosses.
 * Since its toxic clouds can go through blocks, it can be used as an effective tool against enemies that can travel through blocks like worms, Wraiths, Deadly Spheres, or Reapers.
 * A single cloud will instantly disappear each time the weapon damages an enemy, which may or may not limit effectiveness depending on how many enemies are within the spread.
 * The clouds can "boil" lava they touch making it useful in traps that involve lava

Trivia

 * The Toxic Flask, Molotov Cocktail, and the Ale Tosser are the only weapons to feature a thrown bottle/glass projectile.
 * It is the only magic weapon to have this property.
 * Despite having "Flask" in its name, it is in no way related to the buff-granting Flasks: It can neither be consumed nor can it apply buffs to melee weapons.

History
Flasque toxique