So there's :
1. Glydis and Merchant of Souls interaction.
And there's :
2. Glydis and anything else interaction.
No reason why, but that's how it is. Suppose you want a Golem out of Gnomes Engineers from Glydis, well that is working fine. 1 + 1 from Mrs. G, and you got your Golem.
But suppose you want anything out of Merchant of Souls from our dear Centaur., you can't share mana : e.g. : with 2 on Glydis, the only way for you to use that is if you need a 1 drop + having enough energy anyway on Merchant.
..(0 on MoS and 2 on Glydis would = 0 )
Seems to me like a bug. I want to be able to use that 2 energy + 2 on MoS for a 3 drop!