As mentioned, there are some giant artifacts that could use powering out, so we may not want to sleep on the Powerstone part of Urzas Command
SteelSentry on Do you consider "Value" = 3 years ago most deckbuilding templates suggest you use 8-10 pieces of card draw, whether it's the Command Zone's template, the 8x8 method, or otherwise

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As for red, it works similarly to blue, but with damage
You do need to keep a high cost colorless creature in your hand for this card to work, but if you build right it can be an amazing board wipe