In Chatterfang, I've got a very sensible place to run both Urborg and Yavimaya
Were there ever instances where design necessities (draft slots, etc) forced you to push a character into a color or colors that didn't initially occur to you
The "Blue Back No Number" versions (without number) are considered from the very first print run and are the rarest, per PSA CardFacts historical data
For example, when we build a Panharmonicon deck, we want nearly every creature in our deck to have an enters-the-battlefield triggerthe cost of skipping Turn 4 to play Panharmonicon is so high that we need it to be absurdly powerful to be worth the investment
Calculating the optimal energy card ratio demands thorough testing and strategic planning
And while drawing cards equal to demons you control is a great and reliable hand refill, his other ability is perhaps even more exciting