This is a long one. Source of Sorcery is a theorhetical update to the Magic systems of the game, including enchanting and potion brewing.

Changes enchanted book sprites to make differentiating effects easier, adds magic effects to enchanted items.

Weapons enchanted with fire aspect 1 give off light level of 3, fire aspect 2 gives light level 7.

Adds crystals containing the magic abilities used by Evokers (summon Vex, summon Spike) as well as Fireball, lightning strike, grow tree, wither skull, Enderport and others. Can be attatched to weapons via upgrade bench.

Reclassifies witches as a type of Illager, changes their skin to illager grey, chance to drop magic crystal upon death.

Can now brew potions by dropping the ingredients directly into a cauldron and right-clicking with a stick in hand to stir.

Potion effects can be added to weapons by right-clicking a potion filled cauldron with a weapon in hand, this replaces the weapon's durability bar with a coating bar to show how long the potion's effect is bound to the weapon. Once this wears off the durability bar returns.

Adds witch's broom item crafted with one stick, one Lead, and one warped roots. Activate mid jump to fly. Half durability of elytra for gameplay balancing.

Upgrading weapon with lapis lazuli increases XP drop rate

Adds gloves slot to armor loadout and adds gauntlets of each armor type, crafted by making 2 L's in the top-left and bottom-right corners of the crafting table

The Gauntlets of power are a special glove-type artifact that give your melee attacks the sweeping edge effect, with each consecutive attack increasing the strength of the next. Ten consecutive attacks gives knockback 5, haste 3, and looting 2 for 3 minutes

Can finally hatch and tame ender dragon egg. Requires egg to be stored in the center of a 3x3 firepit, built with netherrack to burn infinitely, tended with new wither bone meal item, and fed with chorus fruit until fully grown. Dragon saddle crafted with 5 leather, 2 rotten flesh, and 2 iron ingots. Use chain to steer dragon.