What type of mana can I produce with my Reflecting Pool, if my only other land is a Crumbling Vestige?

My guess: any type, i. e. white, blue, black, red, green, or colorless, because Reflecting Pool checks any ability that could produce mana, not just abilities that are activated abilities and/or mana abilities.

Thanks in advance for your answer!

Sorry for the delay on some of these questions. Some of these questions involved a lot more discussion, and some just slipped through the cracks. We're going to play a little catch-up now.

The Pool's ability will look at colors of mana your lands could produce. The Vestige could produce any color of mana due to its triggered ability, so the Pool will be able to tap for any color of mana (or colorless).

Nathan Long
Magic Rules NetRep