Hi in the terraria wiki under Rainbow Rod
it is stated "The Rainbow Rod can be grouped with multiple projectiles to cause massive damage upon impact of an enemy." Is this really true and if yes how to do it? When I fire 2nd projectile to stack it with the first and control a total of 2, the first flees off and I'm left only with the second projectile?
I... I have no idea what that tip is trying to say. Because no, you can't control multiple projectiles from one weapon, nor is it possible to control the projectiles from the Rainbow Rod and Magic Missile at the same time (unless there's a bug or glitch that I don't know about).
The only thing I can think of it is that maybe it's suggesting to fire off a slow projectile (like the skull) from another weapon, then hit at the same time with the Rainbow Rod? But that wouldn't be anything unique to the Rainbow Rod, so I'm stumped.
Okay, apparently on the mobile version of the game the Rod constantly fires projectiles, so it's possible to amass a group of them to hit all at once.