Seraph's embrace doesnt give +40 mana at start.
When you remove a tear from a mage (already wearing a full seraph's embrace) by adding a spatula, he loses the +40 mana from seraph's for the next round; +20 mana when cast still works.
Veigar gearead with Seraph's embrace + tear Add spatula, removing +mage item from veigar Seraph's doesnt give initial +40 mana for the next round.