Evil Tree!

(Pictures from runescape.wikia.com)
Evil Trees are a Members-only D&D centered on the Woodcutting skill.
There are several different kinds of evil trees,as shown in the video above. All except the Elder Evil Tree have normal counterparts. (normal, oak, willow, maple, yew, and magic.)
Evil Trees can be located by talking to Spirit Trees.
Players are allowed to interact with 2 evil trees per 24 hours.

"Warning: Interacting with a tree at any stage of development counts as one of the two daily trees. This applies to nurturing trees, even if players do not have the required levels to chop or burn the fully grown tree. You can now right click and inspect saplings and young trees to find out what they will grow into. Right clicking to inspect and check a fully grown tree's health, or a sapling's type does not count as one of the daily interactions."

-- The Runescape Wiki

When a player chops the evil tree, they gain XP intermittently, and the amount depends on the kind of tree. An Evil Tree has four roots around it. When chopped at, the roots give XP intermittently, but only about 15. When cut down, the roots give Evil Tree Kindling, which can be used to light the tree's base ablaze. On that note, make sure to bring a Tinderbox! Once the tree is on fire, start chopping and don't stop! If a root gets in your way, chop it down, and save the kindling for later. That way, when there is another evil tree, you can have some ready-and-waiting kindling, to get it lit faster, therefore getting 100% reward faster.

Once it is dead, look inside the trunk of the dead and shriveled up tree. You will find some logs, maybe a birds nest or a tree seed, and maybe even a Key Half!

then, go out into the nearby woods. You get several minutes of Auto-Banking, when you have a full inventory.

Thanks for reading!