Q: Can Goal Foundry and Goal Mill both be in the same game together, and, if so, how would that work if they were both in effect?

A: Sure! It’s totally possible to have them stack if Goal Mill comes into play in a game where Goal Foundry is a Meta Rule. What this would look like is that one would be able to discard Goals from one’s hand and draw to replace them, and then be able to do it a second time in the same turn if one so desired.