There is no fixed ratio between the appearance rate of the regular version of a card and its alternate versions
Even if you're in mono-blue, unless you're a full-on "there's only so much fun in a game of Magic, and I'm here to have all of it" person and are playing 40 CounterspellCounterspells, there's now a better option in Thunderclap DrakeThunderclap Drake
Your opponent decides what to discard, both during the resolution and indirectly by deciding which cards to hold back on their turn as fodder for further discard spells
While, in our ideal world, we'll grow it a bit before it dies so we can reanimate something bigger, this isn't always possible, and getting no reanimation value from its death is brutal
Messenger Hawk's last ability applies even if you drew two or more cards only before Messenger Hawk entered
The Doctor Who Commander Deck includes 1 ready-to-play deck of 100 Magic cards (2 Traditional Foil Legendary Creature cards, 98 nonfoil cards), 10 Planechase cards, 1 six-sided planar die, a 2-card Collector Booster Sample Pack (contains 2 Traditional Foil or nonfoil special treatment cards, with 1 Common or Uncommon and 1 card of rarity Rare or higher), 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card