Speedrun: Expert Moon Lord in
*October 2019: This remains the hardest run I've ever finished, in over 3 years of speedrunning. The run's difficulty consists of achieving an incredible goal in a set time: 2nd night mech bosses.
World Seed: 356510028 Small crimson. Version 1.3.5.3
Speedrun Leaderboard: https://www.speedrun.com/terraria1.3.x
Quick breakdown of the glitches used:
Invincibility: A slime mount gives you a frame of invincibility when you bounce on an enemy, placing a roof above your head at the right height allows you to bounce continuously, and since target dummies are immovable, they are used to exploit the Inv frames indefinitely. Hitting the dummies with a Piercing projectile breaks the glitch though.
Dupe (with item frame, and game restart):
The first allows you to glitch an item frame in multiplayer, making it dupe any items you put in it, as long as you have 2 of them.
The second one is the abuse of getting your Character to roll back without rolling back the world, resulting in Doubling the items you store in a chest.
Duck statues: They cap enemy spawns, preventing anything else from spawning. Statues can normally spawn mobs until a certain amount is spawned, but when ducks interract with water, supposedly, their ID changes, making the statues forget that they're spawned in. That means you can spawn ducks until the cap of 200 is reached, which prevents Celestial pillars and True eyes of cthulhu from spawning.