Recharging Tarantula Trap

This item was implemented in the Summer Update 2011 with The Rookie Guard Quest. Its name and description suggest it was meant to be a temporary state of Tarantula Trap. However, since Tarantula Traps's effect last for 20 seconds, there is no need to limit players using it indefinitely. It is believed to be an Unobtainable Item.
It is hard to see Recharging Tarantula Trap on light backgrounds due to it being white and stringy. Inside a container, it looks like this:

It looks the same as Spider Silk and Steel Spider Silk.