Terraria – How to get a statue to activate from a timer

The enchanted boomerang can be difficult to use against the various Eaters that will swarm you in the Corruption. It's not quite fast enough to take them all out before they overwhelm you or knock you back into one of the many caverns. They like to surround and swarm you very closely.

For traversing the Corruption quickly, I'd recommend:

• The Shiny Red Balloon, Cloud in a Bottle, and/or the Rocket Boots to help you handle jumping over the caverns and over the hills. Mobility is key if you want to outrun the Eaters.
• A sword or other melee weapon to quickly break through the thorn-type plants that hurt you and knock you back and to take care of the Eaters. The Big Eaters have 45 max health, so having one that does enough damage to kill them in 2-3 hits is helpful. Breaking down the thorns will also increase the speed at which you can climb the hills.
• Ranged weapons with a high recast time such as bows and arrows, flails, or spells like the Vilethorn can be handy in trying to keep the Eaters away from you, but I've found that if you stick around too long in one place, you will get swarmed anyway and need to use the melee weapons for a quicker takedown.
• A Grappling Hook or Ivy Whip in case you fall. If you don't have a Lucky Horseshoe, it's very likely you will splat, as the caverns are usually very deep in the Corruption.
• When I first crossed, I kept a bunch of Wood Platforms on me so I could build them over the caverns. This makes re-crossing later on much easier and faster, as you can just run over the caverns, and you won't get knocked into them by the Eaters.

Tunneling under the corruption would be incredibly time consuming, and I'm not sure how far the Ebonstone goes down in your world, so you may not be able to quickly do it at all. Tunneling through Ebonstone would require either a Nightmare/Molten Pickaxe, or a Dryad to sell you Purification Powder so you could mine through it with lesser pickaxes. A skybridge would be less time consuming and is also a viable option, but keep in mind that if you have a Meteorite fall later on, if it hits a skybridge, your crash site will end up with only a few blocks of Meteorite. :(

If you can't handle the Corruption right now, the Dungeon and Skeletron are probably a bit too difficult at the moment with your current gear. If you haven't yet, focus on taking down the Eye of Cthulu and Eater of Worlds so you can make Demonite gear, which will prepare you better for the dungeon. Remember that the Eater of Worlds' individual segments also drop Shadow Scales, so even if you fail in completely killing him, you should be able to get at least a few drops.

Update: Sadly, this method no longer seems to work in recent versions of Terraria. Mannequins break instantly when lava makes contact with them. Statues survive the lava, but when water contacts it, obsidian is now created which displaces the statue.

Original answer: Okay, I've been poking it for a while, and have come up with a way to destroy any amount of water with just two items! This method does require you either tunnel around to get underneath the body of water you want to drain or stand in it while working, but it's still often faster than the old fill/dig method.

All you need is a mannequin (possibly other furniture as well, but something 2 blocks wide worked best in my tests) and a bucket of lava:

1. Dig a 2 by 3 hole underneath — but not connecting to — the body of water.
2. Place the mannequin in the hole, then drop the bucket of lava into it. Wait for the lava to settle.
3. Dig a channel from the water to your lava hole and watch the water vanish!¹
4. Dig out one of the blocks supporting your mannequin² and wait for the lava to settle.
5. Pick your lava back up.

Sadly, you can't reverse the process to destroy large amounts of lava — the lava will happily hover above the water, never making contact, forming obsidian, or being destroyed. Worse, attempting to pick up this glitch lava will destroy your bucket!

¹ The water vanishes because, when falling into lava, it should make obsidian. However, the mannequin prevents the obsidian from being formed (as they would occupy the same space) and the water is simply removed because it has no place to pool.

² If you aren't close enough to your mannequin chamber before breaking this block, the mannequin may fall in the lava and be destroyed. Bring spares!