Szczerbiec

The Szczerbiec is the strongest sword in Terraria. It is crafted using the Terra Blade, Meowmere, a Copper Shortsword, and a variety of other ingredients from all biomes, signifying its unity of all aspects of Terraria. When it is crafted, likely due to its significance, its official weapon title is "[Player Name]'s Szczerbiec". This cannot be changed.

Crafting
Because it is the strongest weapon in the game, the Szczerbiec is an incredibly hard sword to craft. It contains many endgame items such as the Meowmere but also things like the Copper Shortsword to signify progress.

Terra Blade (1) Meowmere (1) Luminite Bar (60) Chlorophyte Bar (60) Shroomite Bar (60) Spectre Bar (60) Meteorite Bar (60) Crystal Shard (75) Copper Shortsword (1)

Trivia
Szczerbiec is the coronation sword that was used in crowning ceremonies of most Polish monarchs from 1320 to 1764.