Yes I agree that the first dual land were obviously very good but also OP.
For my part I wanted to make something that is more like an urza's factory
like. I mean it'll generate quanta but also will have a bonus effect that make it interressant to play. I think this monolith is a good example, and all the other we designed in the serie thread are also fine, btw should I start a topic for the other monoliths ?