Reef Shaman

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

Cat Warriors

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

Kukemssa Serpent

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.

Dream Thrush

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

Ceta Disciple

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

Tidal Visionary

{T}: Target creature becomes the color of your choice until end of turn.

Lynx

Shimmering Mirage

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

Active Volcano

Choose one —
• Destroy target blue permanent.
• Return target Island to its owner's hand.

Island

Giant Growth

Target creature gets +3/+3 until end of turn.

Tinder Wall

Defender (This creature can't attack.)
Sacrifice Tinder Wall: Add {R}{R}.
{R}, Sacrifice Tinder Wall: It deals 2 damage to target creature it's blocking.

Prey's Vengeance

Target creature gets +2/+2 until end of turn.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Forest

Flash Flood

Choose one —
• Destroy target red permanent.
• Return target Mountain to its owner's hand.