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By the way, want to hear about how much of an idiot I am?
I was playing against a dragon, and he cast a spell that halves the cost of cards. I drew Dimension Shift, and I cast a bunch of spells on this creature and then cast Dimension Shift. Then I used the creature, and IN THE SAME TURN, AFTER THAT, I CAST A COUPLE MORE SPELLS and Dimension Shift again. The creature, after Dimension Shift, attacks and leaves the opponent with 1 HP; in the next turn, they defeat me. What would it have cost me to cast the spells first, and then a better creature, history doesn't say, but I felt like the biggest idiot.