When Thassa's Oracle enters, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your library and the rest on the bottom of your library in a random order. If X is greater than or equal to the number of cards in your library, you win the game. (Each in the mana costs of permanents you control counts...
As an additional cost to cast this spell, sacrifice an artifact.Search your library for an artifact card, put that card onto the battlefield, then shuffle.
Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)Other Zombies have ": Regenerate this permanent."
Spike Weaver enters with three +1/+1 counters on it., Remove a +1/+1 counter from Spike Weaver: Put a +1/+1 counter on target creature., Remove a +1/+1 counter from Spike Weaver: Prevent all combat damage that would be dealt this turn.
As an additional cost to cast this spell, sacrifice a green creature.Search your library for a green creature card, put it onto the battlefield, then shuffle.
At the beginning of your upkeep, you may put a soot counter on Smokestack.At the beginning of each player's upkeep, that player sacrifices a permanent of their choice for each soot counter on Smokestack.