Treeguard

Giant trees occasionaly transform from trees, have lots of health and deal very high damage, they are capable of killing an unarmored player in two strikes. They spawn from hacking down trees. Each tree that is felled has a percentage chance of spawning one of these. They have a higher spawn rate during the night. They can spawn from any size tree. When killed, they drop Logs and Meatin relation to size. Can be transformed back into a normal tree by seeding new trees near them. In this mode (tree form) cursors shows 'Attack' over them. In tree mode they can be killed with fire without taking damage. Or you may kill them with ease if you kite them. you can give them a hit, and then run back, repeat this and you will not get hit. Fighting tip, if you kite very close, only running away just when they start swinging and immediately returning and hitting them again, the minimum time between their attacks will let you get in 3 to 4 strikes per dodge.

Sometimes, after being chased for a while, the treeguard will walk around randomly, not attacking you. If this happens, use your time to get ready to fight it again, because it will begin attacking you the next morning (even if it went passive right after morning).

The tent can be used to change your identity and make the treeguard forget you. They will remain neutral until you start to cut trees near them, or attack.

There are generally 3 sizes of tree guard Each with its own difficulty to kill. Pigs will attack the tree guardian if it comes too close to their settlement. This will sometimes kill the tree guard but more often the pigs will die in one swipe.
 * Small
 * Moderate
 * Giant

NOTE- these guardians can spawn from ANY tree including ones you planted yourself.

NOTE2- The tree guard is also refered to as an Ent or as Optimus Pine.