Mirror Entity and Maskwood Nexus If you don't want to bother with naming specific Creature types, or if there's motivation to grant your Creatures all types, there are a couple Changeling-related options
Blood Artist is probably a first choice
As it was a legendary creature, it couldn't just be Knight Owl, it needed a name
Eleven is a sweet little card-drawing engine when she attacks, though as a 3/5 she can quickly get outclassed by bigger creatures later in a typical game of Commander
Once you have drawn a massive handful of cards, you can also play a card with a converted mana cost of 5 or less straight from your hand without having to pay its cost
In terms of cards, each Doctor Who Commander Deck contains a 100 card, pre-constructed Commander Deck, plus 10 Planechase Cards (which add an extra layer of randomness and special effects to your MTG games, should you choose to use them) and a Collector Booster Sample pack, which contains 2 special alt-frame cards, including 1 Rare or Mythic Rare card
