Sulfur Pea

The Sulfur Pea shoots Sulfur Peas (I bet you thought that). Now, even though these peas do normal damage, I bet you are wondering why it costs 125 Sun instead of 100. Its peas, if they pass through a Torchwood, become Gunpowder Peas. Gunpowder Peas themselves aren't highly impressive (they do 2 damage), but if they pass through a Torchwood they become Burning Gunpowder Peas, which explode in a 1.5x1.5 area and deal 10 damage in that area. If the Sulfur Pea's projectile passes through any Torchwood upgrade or the Multiwood, it will jump instantly to the Burning Gunpowder Pea.