Have

Horned Turtle

Calcite Snapper

Shroud (This creature can't be the target of spells or abilities.)
Landfall — Whenever a land you control enters, you may switch Calcite Snapper's power and toughness until end of turn.

Meandering Towershell

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Whenever Meandering Towershell attacks, exile it. Return it to the battlefield under your control tapped and attacking at the beginning of the declare attackers step on your next turn.

Forest

Giant Turtle

Giant Turtle can't attack if it attacked during your last turn.

Thornwood Falls

Thornwood Falls enters tapped.
When Thornwood Falls enters, you gain 1 life.
{T}: Add {G} or {U}.

Island

Simic Guildgate

Simic Guildgate enters tapped.
{T}: Add {G} or {U}.

Cold-Water Snapper

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Arcane Flight

Enchant creature
Enchanted creature gets +1/+1 and has flying.

Giant Tortoise

Giant Tortoise gets +0/+3 as long as it's untapped.

Shellephant

{0}: Choose one. You may activate this ability while Shellephant is in any zone.
• Shellephant has base power and toughness 1/4.
• Shellephant has base power and toughness 3/3.

Thriving Turtle

When Thriving Turtle enters, you get {E}{E} (two energy counters).
Whenever Thriving Turtle attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it.