Spell vamp

Spell vamp is a magical stat that converts a percentage of the ability damage dealt into health regained. Activated abilities that do not state they "apply on-hit effects" or modify your "next basic attack" will benefit from spell vamp.

Spell vamp works off of activated item effects,, and abilities, regardless of the type of damage done. It is calculated from the damage dealt to the enemy after reductions such as magic resistance, armor or effects like.

Champion abilities
Note: ''Only the effect regarding the spell vamp of this abilities is shown. For full description and detail visit each champion page''
 * grants 6% spell vamp, increasing by an additional 1% for every 6 bonus attack damage gained thereafter.
 * grants % spell vamp.
 * grants % spell vamp.
 * grants spell vamp.

Masteries

 * grants spell vamp and life steal.

Runes

 * Quintessences of grant  spell vamp.

Ability Drain
Note: ''These abilities will heal the champion by a percentage of the damage dealt from their ability. These act similar to how spell vamp works, but unlike it, they have no penalty for being AoE abilties.''
 * heals for of the damage dealt.
 * heals for 20% of all damage dealt to enemies, from any source, within the ability's radius.
 * heals for 10% (25% against champions) of the damage dealt.
 * heals for 100% of the damage dealt.
 * heals for 25% (75% against champions) of the damage dealt.
 * heals for 100% of the damage dealt.
 * heals for 80% of the damage dealt.
 * heals for 15% of the damage dealt.
 * heals for 40% of the damage dealt.

Calculations
Spell vamp is multiplied by total spell damage to determine the amount of health restored. Area of effect spells, however, only heal one-third the normal amount.
 * Examples: Dealing 300 single-target damage with 10% spell vamp will heal for 30. Dealing 300 area of effect damage with 10% spell vamp will heal for 10 for each enemy affected.

Trivia
The highest spell vamp value currently possible is attainable on using her  on Twisted Treeline. This requires:
 * Attack Damage sources
 * 150 AD - 2 s
 * 95 AD - While at 30% hp or less
 * 45 AD -
 * 20 AD - nearby allied (aura)
 * 40 AD -
 * 35 AD -
 * 38.25 AD - Marks of, Seals of Might and Glyphs of Might
 * 10 AD -
 * 4 AD -


 * AP(100804undefinedundefined1666435)(undefinedundefinedundefined)
 * 171.76024438 AD -
 * Total Bonus AD:(undefined1509545204035undefined14undefined)undefinedundefinedundefined
 * Conversion: (6)6
 * Total: 126% (decimal of dropped)


 * Spell Vamp sources
 * 20% -
 * 20% -
 * 6% - Quintessences of
 * 3% -
 * Total: 49%


 * increases the given spell vamp, increasing the subtotal of 175% by 20%. Making the maximum spell vamp 210%.