User blog comment:Willbachbakal/(Item Concept) Spell-Based Sustain/@comment-7709681-20141106142423

But, with your changes to spell-vamp, wouldn't sustain-damage caster benefit more than those with burst? On top of that, in all of them you mention that the effects trigger only with magic damage coming from spells, does that mean that true damage no longer triggers spell-vamp?