Mechanical Heart and Badge:

Rare(Non-prime)

Line Value
STR/DEX/INT/LUK +1 to +6
MaxHP/MaxMP/DEF +5 to +60

Rare(Prime)/Epic(Non-prime)

Line Value
STR/DEX/INT/LUK +2 to +13
MaxHP/MaxMP/DEF +10 to +125
%STR/%DEX/%INT/%LUK +1% to +4%
%MaxHP/%MaxMP/%DEF +1% to +4%
All Stat +1 to +6

Epic (Prime) / Unique (Non-prime)

Line Value
%STR/%DEX/%INT/%LUK +2% to +7%
%MaxHP/%MaxMP/%DEF +2% to +7%
%All Stat +1% to +4%

Unique (Prime) / Legendary (Non-prime)

Line Value
%STR/%DEX/%INT/%LUK +3% to +10%
%MaxHP/%MaxMP/%DEF +3% to +9%
%All Stat +2% to +7%
Skills and Potion HP Recovery % Increase +10% to +30%

Legendary(Prime)

Line Value
%STR/%DEX/%INT/%LUK +6% to +13%
%MaxHP/%MaxMP/%DEF +6% to +12%
%All Stat +3% to +10%
Skills and Potion HP Recovery % Increase +20% to +40%