Before and After
The first one is a cantrip that lets you reach further and the second one is a body part of one of the most well known DnD villains.
Mage Hand of Vecna
A ranged spell attack that deals 4d6 radiant damage.
Guiding Bolt
Previously one of the worst spells in DnD, now a solid option for spellcasters who want to use melee weapons.
True Strike
Turns an otherwise fixed damage into a d6 or a d8 damage. And lets you deal 1d4 damage to grappled creatures.
Unarmed fighting
Rather than gaining the godlike supremacy they crave, some wizards who devote their lives to unearthing arcane secrets are reduced to creeping, tormented monsters like this one.
Nothic
One is a large skinny fiend with wings, claws and a stinger. The other one extends your darkvision and lets you see through darkness.
Bone Devil's Sight
A CON save for 8d8 necrotic damage, which some targets automatically fail.
Blight
The pass to ask the DM about information you were too lazy to write down turned into a simple proficiency/expertise and a bonus action study.
Keen Mind
A bonus of +1 AC and +1 DEX if you have at least 16 DEX and a prerequisite feat.
Medium Armor Master
This legendary wizard traveled to a cold region, alongside Mordekainen where he was killed and later reincarnated as a gnome. Later on he became known for creating a handful of spells.
Bigby
Blade Barrier Tattoo
Deals 2d8+1d6 "random" damage.
Chaos bolt
Used to increase the minimum healing you get from hit die. Now lets you use them as a bonus action instead.
Durable
Exclusive for a lesser played species. Gratns +1 DEX and lets you become invisible after taking damage.
Fade away
Waterdeep's most infamous crime lord, and a beholder to boot… You'd be shocked to discover just how much he knows about you…
Yes, you… adventurers.
Xanathar
A chaotic good, huge, human like monster that can create rain and lightning and only its kind takes extra damage from this magic weapon.
Storm Giant Slayer
A huge area that initially deals gd10 buldgeoning damage.
Tsunami
A 6th level spell that was unable to kill in the old book but is now able to do so.
Harm
The ability to use charisma to cast levitate and dispel magic once per day without a spell slot and detect magic at will.
Drow High Magic
The Gith rebellion against the mind flayers began when this legendary hero escaped from slavery and struck a crippling blow to the illithid race.
Gith
After almost a week, the first one increases your DEX by 2 and you can double up on this bonus once per short rest if you attack with something like a bow with the second one.
Manual of Quickness of Action Surge
A cone that deals 2d8 cold damage
Frost Fingers
Now lets you treat any d20 roll as a 20 instead of only ability checks.
Stroke of Luck
This one lets keeps your location secret if you miss an attack while hidden. It also makes you better at hiding in the first place. And if that wasn't enough, it also grants you Blindsight and 1 DEX.
Skulker
This primordial force existed before the gods and is said to have spawned the first obyriths of the Abyss.
the Elder Elemental Eye (Tharizdun)