Dream Thrush

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

Spiketail Hatchling

Flying (This creature can't be blocked except by creatures with flying or reach.)
Sacrifice this creature: Counter target spell unless its controller pays {1}.

Island

Boomerang

Return target permanent to its owner's hand.

Wipe Away

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Return target permanent to its owner's hand.

Churning Eddy

Return target creature and target land to their owners' hands.

Hoodwink

Return target artifact, enchantment, or land to its owner's hand.

Dandân

This creature can't attack unless defending player controls an Island.
When you control no Islands, sacrifice this creature.

Glowing Anemone

When this creature enters, you may return target land to its owner's hand.

Phantasmal Terrain

Enchant land
As this Aura enters, choose a basic land type.
Enchanted land is the chosen type.

Eye of Nowhere

Reef Shaman

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

Aven Fogbringer

Flying
When this creature enters, return target land to its owner's hand.

Tidal Warrior

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

Quicksilver Fountain

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.