If cost were lower, I'd say it would make for a good
quanta source.
Right now... I see two main uses
You could use it to mitigate liquid-shadow's poison effect.
I think you could also build a Voodoo deck around it.
E.g. Pop out voodoo dolls. Load one with poison counters and then pop this.
Poison that hits other dolls you own double affect the opponent. Others will poison enemy creatures.
Another voodoo option: Load opponent with poison spells as normal. Pop out a bunch of voodoo dolls. Then use this.
Depending on how many creatures the opponent has, it could provide a good recirculating poison effect.
Plus, you get back your
quanta and possibly get more.
I wish it were a repeatable ability, like on a permanent or something. That could actually be quite useful, both as a poison spreader and as a quanta producer.
If you gave it a low enough cost, it would allow you to work in
into deck strategies without needing to rely on pillars or pendulums.
(E.g. toadfish, pufferfish and scorpions)