The Worg are rather strong, fast and healthy creatures while loosing the good looks and some smarts.

Increase Strength Score, Dexterity Score or Constitution Score by 2. Increase Dexterity Score or Wisdom Score by 1.
Increase Constitution Score or Wisdom Score by 1. | Decrease Intelligence Score by 1, Decrease Charisma Score by 2.

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

Weapon & Armor Restrictions

Due to you being a quadruped creature, you have a hard time using  weapons, shields & armor unless they are deigned to fit your feral form.
You have disadvantage with weapon attacks that aren't natural weapons & must have these specially made for you, if you wish to use them without disadvantage.

Spellcasting Restrictions

Due to the you can't cast spells that require the following components of Somatic & Material. If you find a way to do so, these are made with disadvantage if they have a attack roll and advantage for those if the spell requires a saving throw. 

You still can cast spells that use a Verbal component but not a Somatic component. Without disadvantage for the attack rolls, & without giving the advantage on a saving throw for all targeted creatures, if the spell requires it.

Creature Type: Monstrosity

For all spells that effect monstrosities. You are effected by them. 

Due to your thick hide, you're granted a +2 bonus to AC or a +1 Bonus to AC. | Please ask your DM, as they might have different rules for large size quadruped player race.

This creature is deadly within melee combat and sort of excels within it.
At the 3rd level, the Bite attack and Claw attacks are counted as magical for the purposes of overcoming resistances and immunity to non-magical attacks & damage.

Bite

1d12 + Strength Modifier Piercing Damage
Increase by one dice size at the following levels accordingly. 5th (2d6), 11th (2d8), 17th (2d10)

Claw

1d6 + Strength Modifier Slashing Damage
Increase by one dice size at the following levels accordingly. 5th (1d8), 11th (1d10), 17th (1d12)

Knockdown

Once per turn after hitting with a melee attack, you can force the target to make a Strength Saving Throw or that creature will be knocked prone.
The DC for this is 8 + your strength modifier + your proficiency modifier.

Equipment for a mount can be pretty expensive to equip properly, so it ends up costing the owner or the worg itself for more then they would like to spend. If the creature can used them that is. This Worg of the Legion will get both of the following the non-Associated inflation & the Legion Discount .

However with your legion these costs are as more fitting of one such as yourself. Starting armor is considered to have been already modified, at no increased initial cost.

-Non Associated-

Armor cost increase by 50% | Weapons cost increase by 100% |

-Legion Discount-

Armor increase cost by 25% instead of 50% | Weapon increase cost by 50% instead. |

You're proficient in the Athletics, Intimidation, and Perception skills.

You can use your strength modifier in place of your charisma modifier for the Intimidation Skill.

You can only speak & understand all languages you know, even with a low intelligence score of a 6. However it might be a issue if that gets even lower.
You will always know Worg no matter how low your intelligence is, due to it being a racial language for your species.

Speak & Understand but (Not Read & Write)

Common, Goblin & Worg.