Gustav, the Kinder Hapser

+1: Target opponent chooses a creature they control. Exile that creature, put a hostage counter on The Basement. If you control Sophus, proliferate.
0: Search your library for a card named The Basement, put it onto the battlefield, and shuffle.
-8: If you control an enchantment with 10 or more hostage counters on it, you win the game.