There are 64 rares you can open in a booster pack, plus five themed rares available in Set Boosters, Theme Boosters, or Collector Boosters
If you pay enough energy, you effectively get to hold on to the cards that were in your hand
Interacting with the trigger with a card like Stifle prevents both of these effects
Your guide through the tutorials is a little glowing ball of light called Sparky, wholl walk you through the basics of playing Magic playing lands, using mana to cast creatures and spells, attacking and blocking, power and toughness of creatures, and dealing damage
Together red and black is one of the most powerful aggressive color pairs in Magic that gives you the means to do what you want most to the most potent effect possible