Arcane Nexus

[rdonj]

Everything on the strategic map other than alchemy that requires gems adds to gems you get from arcane nexus.

[Kheldron]

And of course astral gems and blood slaves used in rituals and forging dont count either

[GrudgeBringer]

So if I cast say 'Burden of time' or Utterdark (I know that is death... for 100 gems and 999 extra D gems and I had Arcane nexus...I would recoup some of that back?

[rdonj]

The description for arcane nexus reads that half of the cost of all spells and forging done on the strategic map is refunded to you. So, for a 999 gem spell you should receive about 450 pearls.