Quest for Ula's Temple [Worldwake]

At the beginning of your upkeep, you can look at the top card of your library. If it's a creature card, you can reveal it and put a quest counter on Quest for Ula's Temple.
At the beginning of each end step, if there are three or more quest counters on Quest for Ula's Temple, you can put a Kraken, Leviathan, Octopus, or Serpent creature card from your hand onto the battlefield.