Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Waterfront Bouncer

{U}, {T}, Discard a card: Return target creature to its owner's hand.

Gaea's Skyfolk

Phyrexian Furnace

{T}: Exile the bottom card of target player's graveyard.
{1}, Sacrifice this artifact: Exile target card from a graveyard. Draw a card.

Lord of Atlantis

Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Island

Manta Riders

{U}: This creature gains flying until end of turn.

Yavimaya Coast

{T}: Add {C}.
{T}: Add {G} or {U}. This land deals 1 damage to you.

Gilded Drake

Flying
When this creature enters, exchange control of this creature and up to one target creature an opponent controls. If you don't or can't make an exchange, sacrifice this creature. This ability still resolves if its target becomes illegal.

Counterspell

Forest

Wonder

Flying
As long as this card is in your graveyard and you control an Island, creatures you control have flying.

Merfolk Looter

Survival of the Fittest

{G}, Discard a creature card: Search your library for a creature card, reveal that card, put it into your hand, then shuffle.

Mox Diamond

If this artifact would enter, you may discard a land card instead. If you do, put this artifact onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add one mana of any color.

Daze

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.

Ceta Disciple

{R}, {T}: Target creature gets +2/+0 until end of turn.
{G}, {T}: Add one mana of any color.

City of Brass

Whenever this land becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

Mana Leak

Counter target spell unless its controller pays {3}.

Winter Orb

As long as this artifact is untapped, players can't untap more than one land during their untap steps.

Squee, Goblin Nabob

At the beginning of your upkeep, you may return this card from your graveyard to your hand.