Can't get communion to work

[MartialDoctor]

Hey all,

It seems that I can't get communion to work at all.

I first tried casting communion master in the first turn along with the others casting communion slave. However, they cast in the wrong order and it didn't work at all.

Now, I have set my communion master to cast in the second turn, after all others have cast communion slave. The communion master here gets no buff at all. However, when I cast a self buff, it affects the slaves and the master.

Any advice on what's going on here and why I can't get it to work?

Thanks.