Ranger Buffs

Improved Favoured Enemy. At Level 1 Ranger, you additionally learn Ensnaring Strike as part of Favoured Enemy. You always have it prepared, and you can cast it a number of times equal to your Proficiency Bonus without expending a spell slot, and you regain all expended uses of this ability when you finish a Long Rest. You may also cast it with any Spell Slots you have. Additionally, when you successfully Ensnare a Creature, you may immediately expend a use of Hunter's Mark (or use a Spell Slot for it) to immediately Mark them without using a Bonus Action (this counts as if you were to cast it normally). If you do, Hunter's Mark doesn't use Concentration, but ends when Ensnaring Strike does or when the target drops to 0 Hit Points

Improved Deft Explorer. At Level 2 Ranger, you additionally learn Find Familiar as part of Deft Explorer. You may only cast it as a Ritual

Improved Roving. At Level 6 Ranger, you additionally gain a damage Resistance of your choice, which you may change after a Long Rest. Additionally, you learn Protection from Evil and Good and always have it prepared. You may cast it once without expending a spell slot, and you regain the use of this ability when you finish a Long Rest

Improved Relentless Hunter. At Level 13, Relentless Hunter instead makes both Hunter's Mark and Ensnaring Strike no longer use Concentration. Additionally, applying Hunter's Mark with Favoured Enemy's Ensnaring Strike does not require the Creature to get Ensnared, and now lasts for its own duration normally. Also, when you Mark a Creature (directly or by transferring it from another Creature), if they're not Ensnared, you may expend a use of Ensnaring Strike (or use a Spell Slot for it) to attempt to immediately apply its effects on that Creature without using a Bonus Action (they make the Save normally)

Improved Precise Hunter. At Level 17, Precise Hunter also gives Creatures Disadvantage against your Ensnaring Strike. This cancels out Advantages they would have had normally

Improved Foe Slayer. At Level 20, Foe Slayer instead increases the damage die of Hunter's Mark and Ensnaring Strike from d6 to d12. Additionally, every time a Creature Ensnared by you takes damage from your Hunter's Mark, they also take Ensnaring Strike's damage