The Crimson Rod is a spell that was added in the Terraria 1.2 update. It is a drop from Pulsating Hearts in The Crimson. When cast, the Crimson Rod creates a cloud which constantly rains damaging blood on enemies below it. This cloud lasts approximately 30 seconds and will be repositioned if the spell is cast again. This is a handy weapon when dealing with more than one enemy, even though it is a weaker version of a Nimbus Rod and only casts one cloud instead of two.
- In the cartoon series known as Adventure Time, there is a similar spell known as Cerebral Bloodstorm, which is a brain that rains damaging blood.
- If the cloud is placed close enough to the ground, the rain can go through up to 3 blocks.
- Added to the game.