Druid

Druids are mysterious. Very much so.

Pre-christian Celtic priests often associated with nature and divination. And human sacrifice. Don't forget the human sacrifice. In modern times druidism has been revived under the new-age movements minus human sacrifice. In fantasy druids are often powerful magicians or cleric variants who get their powers from communing with nature, more like historical shamans.

Druids have long been a staple class of D&D where they are known for their shapeshifting abilities, being able to turn into various animal forms, and being hilariously broken in 3.5e. Using this ability might incur the Familiarity Question, so make sure to run this by the DM prior to playing a Druid.

Druids can turn into bears whose stats have been buffed into the stratosphere who can summon bears whose own stats have been buffed into the stratosphere out of their eyes while farting lightning, pissing acid, shitting explosive berries, and breathing fire that does irresistible damage, thus making your fighter look lame. A little harder to break in Pathfinder, but still top-tier.

However, in D&D 5th edition, buff spells have been changed and the Druid no longer gets an animal companion; however, this is quickly brushed aside when players realize that they can wildshape into a bear at 2nd level (as a bonus action) thanks to the Circle of the Moon. Druids get two choices in 5e: Circle of the Lands, where they pick a chosen land (the Underdark is on the list) and get spells relating to it. Circle of the Moon gives them tons and tons of shapeshifting bonuses, as well as the ability to heal themselves while in wildshape by burning spells. They also have Druidcraft, a spammable cantrip that can work like a weather app, tiny amounts of fertilizer, a candle, or matches depending on how you need to prove your druidic might to someone today.

In November 2016, Unearthed Arcana gave them their first bunch of new Circles; the fae-empowered Circle of Twilight, the conjuration-master/pseudo-Shaman Circle of the Shepherd, and the undead-fighting Circle of Twilight.

They are a mysterious bunch. No one knows who they are, or what they are doing.

Druids are usually fairly close to being "good guys" since, even if their official thing is all about "preserve nature", the fact that bad guys in D&D tend to messing around with necromancy or summoning fiends tends to make for at least "enemy of my enemy is my friend" alliances. Evil druids are, honestly, something of a minority -- but they do happen. Forgotten Realms has the Shadow Circle, which are militant anti-city druids who want to violently destroy all forms of civilization. Eberron has two; the Circle of the Ashbound believe (falsely) that arcane magic harms nature and that destroying magical items and users is good for nature - long story short, it involves their founder killing a lich who'd been screwing around with nature and then noticing nature bounced back really well afterward - and the Children of Winter, social darwinists who believe that "Winter is coming!" and launch eco-terrorist attacks on civilization to winnow out the weak and ensure only the strong will be left to keep everybody from dying out during the "winter phase" of Eberron's life.

The Classes of Pathfinder 1st Edition
Core Classes:	Barbarian - Bard - Cleric - Druid - Fighter - Monk Paladin - Ranger - Rogue - Sorcerer - Wizard
Advanced Player's Guide:	Alchemist - Antipaladin - Cavalier Inquisitor - Oracle - Summoner - Witch
Advanced Class Guide:	Arcanist - Bloodrager - Brawler - Hunter - Investigator Shaman - Skald - Slayer - Swashbuckler - Warpriest
Occult Adventures:	Kineticist - Medium - Mesmerist Occultist - Psychic - Spiritualist
Ultimate X:	Gunslinger - Magus - Ninja - Samurai - Shifter - Vigilante