[Bug] Crash when starting game with very large deck

Hi!
I have been experimenting with creating a deck that contains all cards available in Forge, plus a corresponding amount of basic lands (17962 cards total). Using the deck causes the game to crash in the starting player's upkeep. Mulliganing works. The following report was generated in a game where the AI started, but it also happens when the human player starts.
Link to the deck: https://dl.dropboxusercontent.com/u/5988273/AllCards.zip
I have been experimenting with creating a deck that contains all cards available in Forge, plus a corresponding amount of basic lands (17962 cards total). Using the deck causes the game to crash in the starting player's upkeep. Mulliganing works. The following report was generated in a game where the AI started, but it also happens when the human player starts.
- NullPointerException | Open
Link to the deck: https://dl.dropboxusercontent.com/u/5988273/AllCards.zip