Tier 1 Necklace Modifiers (Level 1>30 & above)

Category: Global

Medicine have 5-10% increased effect
Comsumeables have a 10-20% chance to not be consumed
10%-20% chance to drop an extra bag of Zamogeons
10-20% increased droprate of Supplys (Global).
10-20% increased droprate of Talismans (Global).
10-20% increased droprate of KalCash (Global).
10-20% increased droprate of Quest Items (Global).
Wooden Boxes are now twice as likely to spawn a Treasure Box
Wooden Boxex are more likely to spawn closer to you.
0,005-0,01% chance to spawn a Wooden Box on Monster Kill (6 second cooldown)
Lower Class Demons drop 5-10% increased Equipment.
0,1% Chance to roll Lucky Finish on Kill for the next 10 Monsters.
0,01% Chance to roll Golden Lucky Finish on Kill for the next 10 Monsters.

Tier 2 Necklace Modifiers (Level Ghosts - end of D1 & above)

(previous tier modifiers can still drop, but weight is the same)

Category: Global

Ghosts drop 5-10% increased Equipment.
Devils drop 5-10% increased Equipment. 
Forsaken Forest Monsters drop 5-10% increased Equipment.
Dungeon 1 Monsters drop 5-10% increased Equipment.
1-30% Increased Movement Speed 
0,01% chance to gain a random max grade buff on using a consumeable (cjb,hermit)
 

Tier 3 Necklace Modifiers (after D1)

(previous tier modifiers can still drop, but weight is the same)

Category: Global

Tombs Clover Monsters drop 5-10% increased Equipment.
Wolf Monsters drop 5-10% increased Equipment. 
Dungeon 2 Monsters drop 5-10% increased Equipment.
Dungeon 3 Monsters drop 5-10% increased Equipment.
Highland Monsters drop 5-10% increased Equipment.
Dungeon 4 Monsters drop 5-10% increased Equipment.
Death Valley Monsters drop 5-10% increased Equipment.
Forest of Element Monsters drop 5-10% increased Equipment.
Tower of Priest Monsters drop 5-10% increased Equipment.
Valley of Devah Monsters drop 5-10% increased Equipment.

Category: Increased Damage
Lightning Skills deal 5-10% increased damage
Fire Skills deal 5-10% increased damage
Ice Skills deal 5-10% increased damage
Poison Skills deal 30-40% increased damage

Category: Critical Chance
Lightning Skills have a 1-3% increased critical hit chance
Fire Skills have a 1-3% increased critical hit chance
Ice Skills have a 1-3% increased critical hit chance
Poison Skills have a 1-3% increased critical hit chance

Category: Attack & Cast Speed
Lightning Skills have a 10-20% increased attack & cast speed
Fire Skills have a 10-20% increased attack & cast speed
Ice Skills have a 10-20% increased attack & cast speed
Poison Skills have a 40-50% increased attack & cast speed

Category. Critical Damage
Lightning Skills deal a 6-8% increased critical hit damage
Fire Skills deal a 6-8% increased critical hit damage
Ice Skills deal a 6-8% increased critical hit damage
Poison Skills deal a 6-8% increased critical hit damage

Category Mana
Lightning Skills cost 20-30% reduced mana
Fire Skills cost 20-30% reduced mana
Ice Skills cost 20-30% reduced mana
Poison Skills cost no mana

Category: Self Buff
Self Buff Skills have 15-30% increased effect
While affected by a Self Buff, absorb 0,1-1,0% of incoming damage
While affected by a Self Buff, food & water recovers 20-30% faster

Category: Active Buff
Active Buffs have 30-50% reduced Cooldown
Active Buffs have 15-30% increased effect (rounded up)
Upon activating a Active Buff, there is a 15-30% chance to have its cooldown refreshed by 50%
While affected by a Active Buff, recover 20-30 mana per second.

Category: Passive
Critical Passives have 10-20% increased effect
Magical Passives hve 10-20% increased effect
Mastery Passives have 20-25% increased effect
Concentration Passive has 10-20% increased effect
Defense Passive has 50-100% increased effect
Parry Passive has 10-20% increased effect
Perfect Evasion Passive has 10-20% increased effect

Category: Class
Charge Skills charge 20-30% faster
Charge Skills have a 15-30% chance to consume no mana
Caster Skills cast 40-50% faster
Caster Skills have a 15-30% chance to have its cooldown refreshed by 50%
Cure Skils have 25-50% increased healing effectiveness
Cure Skils have 10-20% increased healing range
Revival Skills prevents 100% of experience loss
Buffs have 5-10% increased effectiveness
Buffs have 50-100% increased buff duration
CC Skills work against Purple Monsters & Last Twice as long while equipped
Curse Skills trigger randomly while using other skills against Monsters & always hit
Leech Skills can overheal and heal for 20-30% more
Leech Skills always hit
Strike Skills have a 6-8% increased chance to trigger explosive Blow
Strike Skills have a 10-15% to completely ignore targets Defense
AoE Skills heal for 3-5% of Damage dealt
AoE Skills have a 1-3% Chance to trigger 2 explosive blow at once
Arrow Skills have 0,5%-1,5% increase base critical chance
Arrow Skills have a 3-5% chance to shoot a second arrow
Wizard Skills have a 3-5% chance to critical strike
Wizard Skills have their mana cost reduced by 25-30%