If an effect allows you to spend mana "as though it were" mana of any color or type, that allows you to spend mana you couldn't otherwise spend, but it doesn't change what mana you spent to cast the spell
Paying all but 100 of your Life Points for Ra will grant you a massive beatstick that can possibly end the game in one turn, but any form of burn damage or direct attacker, no matter how small, will be able to defeat you on the spot
Immediately, this might bring to mind the fact that these TCG companies need to sell new cards in order to stay in business
Honestly, I'm not complaining
Market Signals Factors Affecting Card Prices One element you should watch is playability versus collectibilitycards that see play in Commander or Standard often command premiums
The high number of artifacts in the deck provide me with a lot of ways to spend that mana