Water Bolt on a Dungeon shelf
水矢是个困难模式前的 魔法武器 它能自动射出直线前进并能弹跳的水球，并发出微量光芒，它不受重力影响，并能穿透多个 敌怪。子弹能维持至多30秒钟，但是会在它弹跳5次或是穿透10个敌人时消失。水矢只会在 地牢中被发现, 藏在地牢中放有许多 书 的书架上, 并无法被制造、购买或从宝箱中被发现。
大多数地牢的书架上藏有多个水矢。尽管它在物品栏 有一个红色的外表, 水矢总是一本蓝色的书，上面有黄色的带子。由于频繁的敌人攻击，在地牢中进行仔细的目视检查并不总是实用的，所以下面的任何方法也可以用来定位水矢；
- 右键点击所有看到的书。 唯一一本从右键单击中掉下来的书是水矢, 因为普通的书需要 镐 释放它们 (尽管镐也会释放水矢).
- When the projectile finally dissipates, the glowing embers it releases will fall through solid blocks and momentarily illuminate the area below.
- Once it's taken from a shelf, it can not be put down again whatsoever.
- Ironically the projectile doesn't disappear in lava.
- It is not explicitly required to defeat 骷髅王 to obtain a Water Bolt, as platforms with books can spawn above level 0, sometimes even in the room just past the door into the Dungeon. These can be safely retrieved without causing either 地牢守卫s or unique Dungeon enemies to spawn. As the Water Bolt remains a powerful weapon up until 困难模式, it can be advantageous to check the Dungeon when starting a new world.
- Of course, this does not mean Water Bolts will always spawn above Dungeon Guardians, take caution.
- The durability of the Water Bolt projectile, combined with its ability to ricochet and hit multiple foes, makes it very suitable for fighting groups of enemies, especially in flat valleys and straight passageways. It also has a low enough velocity for it to hit the same enemy more than once even without ricocheting.
- Because of their long range and ricochet, Water Bolt projectiles can be used to detect 漂浮岛s by firing upwards and waiting for the projectile to bounce off and return. Their low speed makes this tedious, however.
- The Water Bolt combined with properly closed arena is very effective way to fight many pre-Hardmode Boss. For example: fighting 世界吞噬怪 or 克苏鲁之脑 gets easy, because single Water Bolt projectile can hit multiple parts multiple times. Same goes for other bosses, although more arena optimization is needed.
- In pre-release footage of the game, both the placed and held Water Bolt sprites were blue. The held Water Bolt sprites were later changed to red, without altering the placed Water Bolt's coloration.
- Some 书架 sprites contain Water Bolt, but can't be looted from.
- 184.108.40.206：Damage increased from 17 to 19.
- Projectile sprite changed.
- Base mana cost reduced from 14 to 10.
- Light effect changed
- Makes a new sound when used.
- Damage increased from 15 to 17.
- 魔力 to cast reduced from 20 to 14.