Senseis Divining Top Time Thief is a term I use to describe a person who plays slowly, or a card that burns large amounts of time in a game of Magic
This effect is incredibly flexible, and can even be used to currey favor with opponents, allowing them to use their cards to remove other players permanents more efficiently
With a deck that loves to cast big creatures, the rest of a Ruby Commander deck should focus on empowering those big-mana critters and ensuring that you're able to refill your hand after you cast all those ramp spells
I call this spinning your wheels. It feels like youre actually doing something, but youre just spending mana to effectively do nothing other than make your hand better and develop your land drops
The sooner the better because the longer its out the more Warrior tokens you can create
Otherwise, I believe the return is not worth the time and effort after shipping costs