He said the cyanide we found at the scenes was real, but so was the strychnine he used to kill Junna and Fujino. That accounts for two uses of toxicity, doesn't it?
Some powers...have a time limit, if that makes sense. Toxicity for example could make as many poisons as they need in an allotted amount of time, versus someone who uses something else on one target and that's it.
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