New mountain structure, mob, and items.

Mountains, despite new generation seem a little bland. Here are a few ideas for making them worth climbing. New structure: Abandoned Tower. This structure is pretty simple: An old, crumbling tower upon a mountain peak. It'd be built from spruce logs and a mix of normal and cracked stone brick. Inside would be loot chests(1 or 2), a furnace, and a 5/10 chance for a new mob to spawn there: The Sentinel. This mob is just what it's name implies: Its a monster created purely to guard these towers from intruders, however, they never got the memo that these towers had been abandoned. With glistening suits of armor (either as a skin or as iron armor equipped) they will try to defeat anyone who enters. When defeated, they drop a unique item: The KNight Rod (get it? Knight but also Night? I'm...sorry for that). This item allows the user to harness a special power. The power of 'Night Haze'. This item, when used on a cloudy night gives the user Strength 1 for the following day as well as helps to keep phantoms away. This item is 1 use. I hope you liked this little idea for a cool new structure, mob, and item to discover on mountains.