Rock Leaf / Petriteris Gunnera

Rock Leaf is a coarse ugly plant found amongst rocky mountain trails and hillside crags. It's large, grey-coloured leaves can easily grow taller than a fully grown human, but their mottling can make them difficult to spot in the wild when naturally camouflaged against the stone it grows from.
Rock Leaf is unique as it has evolved to imbue the properties of stone, from which it draws sustenance. Over time the plant has learnt to break down the stone in order to grow and feed itself. As such, it has become a natural cure for petrification.

Recipe: Rock Paste
The simple salve can be applied to any petrified creature. Simply wrap up the leaves around the victim and wait. Mix a thickener and oil together to form a sticky paste. Coat one side of the leaves with the mixture and wrap it around the victim. Young Rock Leaves are normally around 4 feet long, but they can grow as long as 8 feet in the wild. How many you need depends on the size of the victim.

The effect:
Creatures wrapped in Rock Paste will be cured of petrification after 15 minutes. Additionally, creatures cured of petrification in this way are immune to restraint for 4 hours and cannot be petrified again for 3 days.