A Boom-Drupe is a fruit-bearing tree that grows wild all across the lands. The fruit that grows abundantly looks like an apple -- red in color and about the size of a man's fist. The Boom-Drupe has a sweet, delightful aroma and smells and looks delicious. And it *is* delicious...for the 5 seconds you enjoy it. For you see, the Boom-Drupe's fruity flesh is actually dangerously explosive. Upon consumption, the fruit will violently explode 5 seconds later. The explosion will deal 8d6 hit points of damage to the consumer (usually killing them instantly) and 4d6 hit points of damage to any within 10 feet.
Interestingly, the Boom-Drupe is only explosive when consumed, as saliva apparently triggers the explosive effect. Cutting it, crushing it, slicing it, throwing it, etc. will not trigger the fruit's explosive effects. Only by taking it into the mouth will the fruit's nature be revealed...violently. Assassins and killers have been known to crush the fruit's flesh and let it dry into a flaky dust that can be sprinkled into food and beverage. This dust will remain inert until consumed at which point it will explode with lethal force.
NOTE: This deadly fruit was inspired by the post-apocalyptic, sword-and-sorcery cartoon "Korgoth of Barbaria." Let's see how much material a 22-minute pilot can provide us! Stay tuned for future installments of Korgothursday!