Thassa, God of the Sea

Put target spell or nonland permanent into its owner's library second from the top.

At the beginning of your upkeep, reveal the top card of your library. If it's a creature card that shares a creature type with a creature you control, you may cast it without paying its mana cost. If you don't cast it, put it on the bottom of your library.

This land enters tapped. When this land enters, exile target player's graveyard. T: Add B.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) T: Add C. 5, T: Draw a card. Activate only if you have the city's blessing.

As this land enters, you may reveal a Swamp or Mountain card from your hand. If you don't, this land enters tapped. T: Add B or R.

Flash (You may cast this spell any time you could cast an instant.) Flying 3U: Draw a card.

(T: Add R or G.) This land enters tapped unless you control two or more basic lands.

When this artifact enters, search your library for up to two basic Plains cards, reveal them, put them into your hand, then shuffle. Whenever a land an opponent controls enters, if that player controls more lands than you, you may put a land card from your hand onto the battlefield.