Nov 19, 2017
I have a reflecting pool and a calciform pools with no counters on it, can I tap the pool for white/blue mana
Yes, you can. The type/color of mana a land "could produce" is any type/color of mana any of its mana abilities would generate were they to resolve at that time. You don't have to be able to actually activate those mana abilities. For example, you could tap Reflecting Pool for colorless mana or mana of any color if you controlled only it and Cascading Cataracts, even though there is no way you could activate the "5, T: Add five mana in any combination of colors to your mana pool." ability with your current resources.
