Put a flood counter on target land. That land is an Island in addition to its other types for as long as it has a flood counter on it. If you control a Merfolk, draw a card.

Each land is a Swamp in addition to its other land types.

Nonbasic lands are Mountains.

Enchant land

Enchanted land is a Swamp.

Whenever enchanted land becomes tapped, its controller loses 2 life.

At the beginning of your upkeep, sacrifice Conversion unless you pay {W}{W}.

All Mountains are Plains.

Enchant land

As Convincing Mirage enters the battlefield, choose a basic land type.

Enchanted land is the chosen type.

When Cyclopean Giant dies, target land becomes a Swamp. Exile Cyclopean Giant.

{2}, {T}: Put a mire counter on target non-Swamp land. That land is a Swamp for as long as it has a mire counter on it. Activate only during your upkeep.

When Cyclopean Tomb is put into a graveyard from the battlefield, at the beginning of each of your upkeeps for the rest of the game, remove all mire counters from a land that a mire counter was put onto with Cyclopean Tomb but that a mire counter has not been removed from with Cyclopean Tomb.

{X}{G}{G}, {T}, Discard a card: X target lands become Forests until end of turn.

Flying

{T}: Target land becomes the basic land type of your choice until end of turn.

Dreamwinder can't attack unless defending player controls an Island.

{U}, Sacrifice an Island: Target land becomes an Island until end of turn.

Enchant land

Enchanted land is a Swamp.

Floodchaser enters the battlefield with six +1/+1 counters on it.

Floodchaser can't attack unless defending player controls an Island.

{U}, Remove a +1/+1 counter from Floodchaser: Target land becomes an Island until end of turn.

As long as Gaea's Liege isn't attacking, its power and toughness are each equal to the number of Forests you control. As long as Gaea's Liege is attacking, its power and toughness are each equal to the number of Forests defending player controls.

{T}: Target land becomes a Forest until Gaea's Liege leaves the battlefield.

At the beginning of your upkeep, sacrifice Glaciers unless you pay {W}{U}.

All Mountains are Plains.

Plainswalk (This creature can't be blocked as long as defending player controls a Plains.)

Whenever Graceful Antelope deals combat damage to a player, you may have target land become a Plains until Graceful Antelope leaves the battlefield.

Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

As Illusionary Terrain enters the battlefield, choose two basic land types.

Basic lands of the first chosen type are the second chosen type.

Target land becomes the basic land type of your choice until end of turn.

Draw a card at the beginning of the next turn's upkeep.

{T}: Target land becomes a Forest until end of turn.

Kukemssa Serpent can't attack unless defending player controls an Island.

{U}, Sacrifice an Island: Target land an opponent controls becomes an Island until end of turn.

When you control no Islands, sacrifice Kukemssa Serpent.

Enchant land

Enchanted land is an Island.

Cycling {2} ({2}, Discard this card: Draw a card.)

Enchant land

Enchanted land is a Mountain, Forest, and Plains.

Nonbasic lands are Mountains.

Flying

{2}, Return a land you control to its owner's hand: Target land becomes the basic land type of your choice until end of turn.

{T}: Target land becomes an artifact in addition to its other types until end of turn.

{1}, {T}: Target land becomes the basic land type of your choice until end of turn.

Until end of turn, all creatures become black and all lands become Swamps.

Enchant land

When Nylea's Presence enters the battlefield, draw a card.

Enchanted land is every basic land type in addition to its other types.

{T}: Target land becomes a Swamp until its controller's next untap step.

Enchant land

As Phantasmal Terrain enters the battlefield, choose a basic land type.

Enchanted land is the chosen type.

At the beginning of each player's upkeep, that player puts a flood counter on target non-Island land they control of their choice. That land is an Island for as long as it has a flood counter on it.

At the beginning of each end step, if all lands on the battlefield are Islands, remove all flood counters from them.

{T}: Target land becomes the basic land type of your choice until end of turn.

{T}: Target land becomes the basic land type of your choice until end of turn.

Enchant land (Target a land as you cast this. This card enters the battlefield attached to that land.)

Enchanted land is an Island.

Target land becomes the basic land type of your choice until end of turn.

Draw a card.

{T}: Target land becomes a Swamp until end of turn.

Enchant permanent

Enchanted permanent is a colorless Forest land.

Enchant land

When Spreading Seas enters the battlefield, draw a card.

Enchanted land is an Island.

{T}: Target Merfolk creature gets +1/+1 and gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.)

{T}: Target land becomes an Island until end of turn.

Enchant land

When Tainted Well enters the battlefield, draw a card.

Enchanted land is a Swamp.

Each creature you control can't be blocked as long as defending player controls an artifact land.

{T}, Sacrifice a green creature: Target land becomes a Forest. (This effect lasts indefinitely.)

{T}: Target land becomes an Island until end of turn.

{T}: Target land becomes the basic land type of your choice until end of turn. Activate only during your turn.

{T}: Target land becomes a Plains or an Island until end of turn.

Each land is a Swamp in addition to its other land types.

When Vedalken Plotter enters the battlefield, exchange control of target land you control and target land an opponent controls.

Choose one --

• Target player mills four cards.

• Choose a land type and a basic land type. Each land of the first chosen type becomes the second chosen type until end of turn.

• Target artifact phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before its controller untaps during their next untap step.)

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

When Yavimaya Dryad enters the battlefield, you may search your library for a Forest card, put it onto the battlefield tapped under target player's control, then shuffle.

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

When Yavimaya Dryad enters the battlefield, you may search your library for a Forest card, put it onto the battlefield tapped under target player's control, then shuffle.

Tap an untapped Zombie you control: Target land becomes a Swamp until end of turn.

Tap an untapped Zombie you control: Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.)