Ability Score Increase. Your Strength or dexterity score increases by 1 and your Constitution score increases by 1, Intelligence and Charisma decreases by 1.
Keen Smell. The troll has advantage on Wisdom (Perception) checks that rely on smell.
Regeneration. The troll regains 10 hit points per short rest. Can regenerate a limb after a short rest if you hold the limb next to it. Fully regenerate a limb after a long rest.
Skills. Proficient in Perception, and two others of your choice.
Fast Recovery. Ability can use a number of times a rest per Constitution modifier can reroll a d6+your Constitution modifier. If you have taken fire or acid damage the round before this does not work.
Languages. Common(for your area) and Giant.