Looking for some clarification about Spell-Vamp
UPDATE: Answered
Original Post: Quick questions regarding Spell-Vamp for any Rioters who know all the technical stuff behind League:
How Exactly does Spell-Vamp work?
More specifically, does it effect All Magic Damage Output, All Damage done by Abilities, or Only Magic Damage done by Abilities?
And just in case that doesn't also these questions:
Will it effect Magic Damage inflicted by
Nashor's Tooth?
How about
Sunfire Cape,
Wit's End and the 


Devourer Enchantment?
A timely response would be much appreciated, Riot! Thank you!
Additional Thoughts:
I wish there was an actual Magic Damage counterpart to Life-Steal, now...
Also, a random thought: Why isn't there a final item that exclusively increases AD (By at least 100), even without any other effects? (
Infinity Edge doesn't count, as it's reliant on the use of Basic Attacks to Critically Strike)
or
, for example) crowded out most of the other, more AA-based champs because BT's 100 AD (after stacking) simply meant more to them than IE did to, say,
.