Cavern of Souls

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {1} to your mana pool. {T}: Add one mana of any color to your mana pool. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Slayers' Stronghold

{T}: Add {1} to your mana pool. {R}{W}, {T}: Target creature gets +2/+0 and gains vigilance and haste until end of turn.

Azusa, Lost but Seeking

You may play two additional lands on each of your turns.

Tolaria West

Tolaria West comes into play tapped. {T}: Add {U} to your mana pool. Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with converted mana cost 0, reveal it, and put it into your hand. Then shuffle your library. Play only as a sorcery.)

Hive Mind

Whenever a player casts an instant or sorcery spell, each other player copies that spell. Each of those players may choose new targets for his or her copy.

Radiant Fountain

When Radiant Fountain enters the battlefield, you gain 2 life. {T}: Add {1} to your mana pool.

Pact of Negation

Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.

Slaughter Pact

Destroy target nonblack creature. At the beginning of your next upkeep, pay {2}{B}. If you don't, you lose the game.

Summoner's Pact

Search your library for a green creature card, reveal it, and put it into your hand. Then shuffle your library. At the beginning of your next upkeep, pay {2}{G}{G}. If you don't, you lose the game.

Engineered Explosives

Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.) {2}, Sacrifice Engineered Explosives: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Engineered Explosives.

Seal of Primordium

Sacrifice Seal of Primordium: Destroy target artifact or enchantment.

Gruul Turf

Gruul Turf enters the battlefield tapped. When Gruul Turf enters the battlefield, return a land you control to its owner's hand. {T}: Add {R}{G} to your mana pool.

Serum Visions

Draw a card. Scry 2 (Look at the top two cards of your library. Put any number of them on the bottom of your library and the rest on top of it in any order.)

Primeval Titan

Trample Whenever Primeval Titan enters the battlefield or attacks, you may search your library for up to two land cards, put them onto the battlefield tapped, then shuffle your library.

Selesnya Sanctuary

Selesnya Sanctuary comes into play tapped. When Selesnya Sanctuary comes into play, return a land you control to its owner's hand. {T}: Add {G}{W} to your mana pool.

Sunhome, Fortress of the Legion

{T}: Add {1} to your mana pool. {2}{R}{W}, {T}: Target creature gains double strike until end of turn.

Ancient Stirrings

Look at the top five cards of your library. You may reveal a colorless card from among them and put it into your hand. Then put the rest on the bottom of your library in any order. (Cards with no colored mana in their mana costs are colorless. Lands are also colorless.)

Sleight of Hand

Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Pyroclasm

Pyroclasm deals 2 damage to each creature.

Swan Song

Counter target enchantment, instant, or sorcery spell. Its controller puts a 2/2 blue Bird creature token with flying onto the battlefield.

Vesuva

As Vesuva comes into play, you may choose a land in play. If you do, Vesuva comes into play tapped as a copy of the chosen land.

Summer Bloom

You may play up to three additional lands this turn.

Gemstone Mine

When Gemstone Mine comes into play, put three mining counters on it. {T}, Remove a mining counter from Gemstone Mine: Add one mana of any color to your mana pool. If there are no mining counters on Gemstone Mine, bury it.

Amulet of Vigor

Whenever a permanent enters the battlefield tapped and under your control, untap it.

Bojuka Bog

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile all cards from target player's graveyard. {T}: Add {B} to your mana pool.

Khalni Garden

Khalni Garden enters the battlefield tapped. When Khalni Garden enters the battlefield, put a 0/1 green Plant creature token onto the battlefield. {T}: Add {G} to your mana pool.

Boros Garrison

Ghost Quarter

Golgari Rot Farm

Simic Growth Chamber

Mana Confluence

Leyline of Sanctity

If Leyline of Sanctity is in your opening hand, you may begin the game with it on the battlefield. You have hexproof. (You can't be the target of spells or abilities your opponents control.)

Temple of Mystery

Temple of Mystery enters the battlefield tapped. When Temple of Mystery enters the battlefield, scry 1. {T}: Add {G} or {U}.

Island

({T}: Add {U}.)

Forest

({T}: Add {G}.)