Meowmere is a strong weapon in that's part of an interesting crossover. Because of its rarity, special features, and callback to, many players are looking to get it.
Unfortunately, getting the Meowmere sword isn't easy and requires hours of effort. It involves plenty of resource gathering but also requires the necessary levels to get the weapon.
There are ways to make the process slightly easier, but getting it in an already-established world requires focus. Meowmere is what was promised in the x crossover teaser.
The sword was added in the update alongside the hardcore mode. This weapon stands out above regular weapons as it lets players shoot out kitten faces that come with a rainbow trail.
These bounce off the ground and continue forward until they hit enemies. Players don't actually need to be up close and personal to damage enemies with Meowmere.