Auspicious Aquarium

Artifact

Each creature you control that's a Clamfolk, Crab, Crocodile, Fish, Homarid, Jellyfish, Kraken, Leviathan, Lobster, Merfolk, Nautilus, Octopus, Otter, Oyster, Seal, Serpent, Shark, Shrimp, Sponge, Squid, Starfish, Trilobite, Turtle, Walrus, or Whale gets +2/+2.
At the beginning of your upkeep, if you control twelve different creatures from the above list and don't control a Brushwagg, you win the game.