Bonus Proficiencies
At 3rd level, you gain proficiency in three of the following skills of your choice: Acrobatics, Athletics, Investigation, Medicine, Nature, Perception, Stealth, or Survival. You can choose to gain proficiency with thieves' tools in place of one skill choice.
Combat Superiority
At 3rd level, you have four superiority dice, which are d8s. A superiority die is expended when you use it. You regain all of your expended superiority dice when you finish a long or short rest. You gain another superiority die at 7th level and one more at 15th level. You can expend superiority dice to gain a number of different benefits:
When you make a check that allows you to apply your proficiency in Athletics, Nature, Perception, Stealth, or Survival, you can expend one superiority die to bolster the check. Add half the number rolled on the superiority die (rounding up) to your check. You apply this bonus after making the check but before learning if it was successful.
When you make a weapon attack against a creature, you can expend one superiority die to add it to the attack roll. You can use this ability before or after making the attack roll, but before any of the effects of the attack are applied.
If you are hit by an attack while wearing light or medium armor, you can expend one superiority die as a reaction, adding the number rolled to your AC. If the attack still hits, you take half damage from it.
Natural Explorer
At 3rd level, you gain the ranger class feature of the same name, with the following alteration:
You choose additional favored terrain types at 7th and 15th level.
Alternately, your DM may let you take the UA Revised Ranger version of Natural Explorer, which gives:
You ignore difficult terrain.
You have advantage on initiative rolls.
On your first turn during combat, you have advantage on attack rolls against creatures that have not yet acted.
You gain all travel benefits, in the feature normally.
Improved Combat Superiority
At 10th level, your superiority dice turn into d10s. At 18th level, they turn into d12s.
Relentless
Starting at 15th level, when you roll initiative and have no superiority dice remaining, you regain 1 superiority die.