When an affect would cause you to move other than by teleportation, you can use your reaction to remain where you are. Once used your speed is half until the end of your next turn. 

Your base armor class is 13 + your dex modifier. 

After you take fire damage you are unable to use your reaction until the end of your next turn.

You speak common and elven

While the treant remains motionless, it is indistinguishable from a normal tree.

Your Strength score increases by 2, your Wisdom score increases by 1.

Your connection to the ground lets you sense the movement of nearby creatures. You have Tremorsense out to 15 feet.