30 Assassins, both great and pathetic. - Die, by our hands…
Barnacles and bilge rats, a pernicious package of perfidious pirates!
The are 30 thieves, killers and other criminals that ought to be behind bars.
Another real world thing. White tea. Can only be picked two days a year, the two days before the flowers blossom. Could be a similiar plant that...is the deadliest poison known, cure known diseases or psychosis, or a potent herb that just tastes awesome.