Ice Trolls are somewhat larger and bulkier than humans but not as large as a generic troll. They range in height from 9 to 10 feet tall. Your size is large.

Your base walking speed is 40 feet.

Thanks to your cave dwelling ancestors, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You gain Proficiency and Advantage in the Intimidation skill.

You are proficient with Unarmed Strikes and the base damage before modifiers is doubled. Your Unarmed Strike deals both bludgeoning and slashing damage. 

When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. You can’t use this feature again until you finish a short or long rest.

When you score a critical hit with a melee weapon attack, you can roll one of the weapon’s damage dice one additional time and add it to the extra damage of the critical hit.

You know the Shape Ice cantrip when you reach level 2. The range and size of the spell increase by 5 feet per character level attained after 2. Constitution is your spellcasting ability for this spell.

You can speak, read, and write Common and Giant.

Due to your rough habitat, you have a base climbing speed of 15 feet.

Due to your cold climate and body temperature, your skin is cold to the touch and you are Immune to cold attacks. You gain Advantage in saving throws involving fire damage or fire spells and the Difficulty Class and opposing ability check against you is halved (rounded down); however, any fire damage you recieve is doubled before modifiers.

Both your Strength and your Constitution scores increase by 3.

You gain Advantage in Constitution saving throws and ability checks.

At the start of your turn, you recover 1 hit die  of your highest denomination. If you took acid or fire damage before your turn, this effect does not activate in your next turn. You die only if you start your turn with 0 or negative health and do not regenerate.

So long as they can keep their core body temperature down, Ice Trolls have been known to live more than 750 years. They age noticeably quicker than the average human and reach adult-hood at age 14.

Ice Trolls inherit a strong tendency toward chaos from their parents and are not inclined toward good.

You have advantage on Wisdom (Perception) checks that rely on smell.

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

Your Charisma score decreases by 2.