Level 10 -  Scaling sweeping damage ratio.

Level 20 - Chance for additional crit.

Level 30 - Chance for lifesteal.

Level 40 - 2 block reach extension while holding any melee weapon.

Level 50 - Scaling reduced attack cooldown.

Variable definitions:
A = Attack Level
d = Damage dealt

Base Scaling:
Attack damage is scaled with an addition of [A/10], meaning the player's base attack value (1) gets an additional tenth of the player's attack level added on. One attack is half a heart.
ie. If A = 5, then attack value = 1.5.

Level 10 Sweeping Damage Scaling:
Sweeping damage ratio is the percentage amount of the player's base attack transferred in the sweep of swords. This is increased by [A/100], meaning the player's sweeping damage ratio is set to one hundredth of the player's attack level.
ie. If A = 5, then sweeping damage ratio = 0.05 (5% transfer).

Level 20 Additional Crit Chance:
Additional Crit chance is a chance to deal an additional non-Minecraft crit. This crit does not need a jump and can be triggered at any point. It's indicated with an evoker fangs attack sound and spark particle. 
It increases damage by an additional [d(A/10)] with a chance of [(A - 19) in 100].
ie. If A = 20 and damage = 1, then total damage = 3 with a chance of 1%.

Level 30 Chance for Lifesteal:
Lifesteal gives you a percentage of the player's damage back as life. It's indicated with an evoker spell cast sound and star particle. It gives back the player [d((A-29)/10)] clamped below 5 with a chance of [A in 100], meaning the player gets a their damage times hundredth of half of the attack level that lifesteal is unlocked at, and it cannot exceed +5hp.
ie. If A = 30 and damage = 5, then health gained = 0.1 with a chance of 30%.

Level 40 2 Block Reach Extension:
Grants a 2 block reach extension when holding any item tagged with "c:tools/melee_weapon."

Level 50 Reduced Attack Cooldown Scaling:
Attack speed is scaled with an additional [A/50] while holding any melee weapon, meaning the player's base attack cooldown (4) gets an additional 50th of the player's attack level added on.
ie. If A = 75, then attack speed = 5.5.

Level 10 - Additional base experience from mining.

Level 20 - 1 additional fortune level.

Level 30 - 2 block reach extension while holding any mining tool.

Level 40 - Scaling fortune level.

Variable definitions:
M = Mining Level

Base Scaling:
Base block break speed is scaled with an addition of [M/10], meaning the player's base block break speed value (1) gets an additional tenth of the player's mining level added on.
ie. If M = 5, then block break speed value = 1.5.

Level 10 Additional Base Experience:
All ores drop 1 to 3 additional experience with values of [(M/2)-1] to [(M/2)+1], meaning an ore can drop up to three times the player's mining level of experience, plus or minus 1.
ie. If M = 10, then experience orbs with the values of 4 to 6 can spawn up to three times.

Level 20 Additional Fortune Level:
This single additional fortune level has a 50% chance to spawn 1 additional drop from any mined ore.

Level 30 2 Block Reach Extension:
Grants a 2 block reach extension when holding any item tagged with "minecraft:pickaxes" or "minecraft:shovels."

Level 40 Scaling Fortune Level:
Additional Fortune is an additional non-vanilla bonus that has a chance to spawn an additional [((M-39)/2)-2] to [((M-39)/2)+2] (rounded), meaning an ore can drop up to half the player's mining level starting at the point the perk is unlocked, plus or minus 2.

Variable Definitions:
W = Woodcutting Level

Base Scaling:
Base block break speed is scaled with an addition of [W/10], meaning the player's base block break speed value (1) gets an additional tenth of the player's woodcutting level added on.
ie. If W = 5, then block break speed value = 1.5.

Variable Definitions:
V = Vitality Level

Base Scaling:
Armor is scaled with an addition of [V/4], meaning the player gains base armor of a fourth of their vitality level.
Max health is scaled with an addition of [V/10], meaning the player's base max health (20) gets an additional tenth of the player's vitality level added on.
ie. if V = 10, then armor = 2.5 and vitality = 21

Level 10 - 3x3 tilling.

Level 20 - 3x3 planting.

Level 20 - Apply increased drops to special crops.

Level 30 - 3x3 harvesting.

*Level 30 - Instant use consumables.

Level 40 - 3x3 bonemealing.

Level 40 - 3x3 perks no longer consume extra.

*Level 40 - Consumables no longer have a cooldown.

*Requires Artifacts mod

Variable Definitions:
α = Agriculture Level

Base Scaling:
Crops have a [α in 100] to drop 1 to 3 (50% weighting towards 1) of each item in their loot tables.
ie. if α = 10 and the crop is potatoes, then there is a 10% chance to drop up to 3 additional potatoes.

Level 10 3x3 Tilling:
Hoes can now till soil in a 3x3x3 area. (Crouch to disable).

Level 20 3x3 Planting:
Seeds can now be planted in a 3x3x3 area. (Crouch to disable).

Level 20 Apply Increased Drops to Special Crops:
Wheat, pumpkin, sugarcane, and cactus now have a [α in 100] to drop double.

Level 30 3x3 Harvesting:
Hoes can now harvest fully grown crops in a 3x3x3 area. (Crouch to disable).

Level 30 Instant Use Consumables:
Uses Artifacts' eating speed and dirnking speed attributes to make all consumables instantly usable.

Level 40 3x3 Bonemealing:
Bonemeal is now applied to crops in a 3x3x3 area. (Crouch to disable).

Level 40 3x3 Perks No Longer Consume Extra:
All previous 3x3 perks no longer consume more durability or items than 1.

Level 40 Consumables No Longer Have a Cooldown:
Only enabled with Artifacts as no vanilla foods have cooldowns. Makes any consumables with a cooldown no longer have one.