Finally, pick which player will go first
Preventing most (or all) of your opponent's damage while allowing all of yours is pretty keen
As you likely know, last weekend we were given a look into what the Mystery Booster Convention Pack looked like, including a special set of playtest cards showing up in each pack
By discarding 1 card from your hand, you can select 2 cards ("Charmer" monster, "Familiar-Possessed" monster, or "Possessed" Spell/Trap card) from your Deck, add 1 to your hand, and then Set the other to your field
Normally she's a kind, loving sister, but I wonder about when she duels
Lifelink-Soldier Fireball is the answer to essentially everything but counterspells, and even then its effective in baiting counter magic out so that a key threat can be resolved the next turn