Keruga, the Macrosage can be your companion if every nonland card in your starting deck has mana value 3 or greater. This sacrifices early-game efficiency in exchange for reliable access to a sizable creature that can refill your hand.
When Keruga enters, you draw a card for each other permanent you control with mana value 3 or greater. Adventure cards and flexible interaction can help a Keruga deck survive the early turns without violating its deckbuilding restriction.
