You may play an additional land on each of your turns.

Landfall -- Whenever a land enters the battlefield under your control, you may draw a card.

{T}: Add {C}.

{G}{U}, {T}: You may cast spells this turn as though they had flash.

Reach

When Arboreal Grazer enters the battlefield, you may put a land card from your hand onto the battlefield tapped.

Arixmethes, Slumbering Isle enters the battlefield tapped with five slumber counters on it.

As long as Arixmethes has a slumber counter on it, it's a land. (It's not a creature.)

Whenever you cast a spell, you may remove a slumber counter from Arixmethes.

{T}: Add {G}{U}.

Return target card from your graveyard to your hand.

Bala Ged Sanctuary enters the battlefield tapped.

{T}: Add {G}.

Destroy target permanent. Its controller creates a 3/3 green Beast creature token.

When Breaching Leviathan enters the battlefield, if you cast it from your hand, tap all nonblue creatures. Those creatures don't untap during their controllers' next untap steps.

When Brinelin, the Moon Kraken enters the battlefield or whenever you cast a spell with mana value 6 or greater, you may return target nonland permanent to its owner's hand.

Partner (You can have two commanders if both have partner.)

Destroy target artifact or enchantment. You may put a land card from your hand onto the battlefield.

{T}: You may put a land card from your hand onto the battlefield. If you control ten or more lands, flip Budoka Gardener.

{4}{G}{G}, {T}: Create an X/X green Elemental creature token, where X is the number of lands you control.

When Coiling Oracle enters the battlefield, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.

Buyback--Sacrifice a land. (You may sacrifice a land in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)

Prevent all combat damage that would be dealt this turn.

Coral Atoll enters the battlefield tapped.

When Coral Atoll enters the battlefield, sacrifice it unless you return an untapped Island you control to its owner's hand.

{T}: Add {C}{U}.

When Court of Bounty enters the battlefield, you become the monarch.

At the beginning of your upkeep, you may put a land card from your hand onto the battlefield. If you're the monarch, instead you may put a creature or land card from your hand onto the battlefield.

Surge {3}{U}{U} (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)

Return all nonland permanents to their owners' hands. If this spell's surge cost was paid, create an 8/8 blue Octopus creature token.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

As an additional cost to cast this spell, return a land you control to its owner's hand.

Counter target spell.

Flash

Emerge {5}{U}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)

When you cast this spell, tap up to four target permanents.

{T}: Add {G}.

When Elvish Pioneer enters the battlefield, you may put a basic land card from your hand onto the battlefield tapped.

Return to their owners' hands all creatures with toughness less than or equal to the number of Islands you control.

When Eternal Witness enters the battlefield, you may return target card from your graveyard to your hand.

Draw two cards. You may put a land card from your hand onto the battlefield.

You may play an additional land this turn.

Draw a card.

{T}: Add {G}.

{0}: You may put a basic Forest card from your hand onto the battlefield. Activate only as a sorcery and only once each turn.

Sacrifice Gaea's Touch: Add {G}{G}.

{T}: Add {C}.

{0}: Return Ghost Town to its owner's hand. Activate only if it's not your turn.

Draw a card. You may put a land card from your hand onto the battlefield.

Guildless Commons enters the battlefield tapped.

When Guildless Commons enters the battlefield, return a land you control to its owner's hand.

{T}: Add {C}{C}.

Permanents you control gain hexproof and indestructible until end of turn.

Flash

This spell can't be countered.

Whenever you cast a spell, choose up to one --

• Return target spell you don't control to its owner's hand.

• Return target nonland permanent to its owner's hand.

This spell costs {1} less to cast for each snow land you control.

When Icebreaker Kraken enters the battlefield, artifacts and creatures target opponent controls don't untap during that player's next untap step.

Return three snow lands you control to their owner's hand: Return Icebreaker Kraken to its owner's hand.

Jungle Basin enters the battlefield tapped.

When Jungle Basin enters the battlefield, sacrifice it unless you return an untapped Forest you control to its owner's hand.

{T}: Add {C}{G}.

When Kederekt Leviathan enters the battlefield, return all other nonland permanents to their owners' hands.

Unearth {6}{U} ({6}{U}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Landfall -- Whenever a land enters the battlefield under your control, you may put a quest counter on Khalni Heart Expedition.

Remove three quest counters from Khalni Heart Expedition and sacrifice it: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Create an 8/8 blue Kraken creature token with hexproof.

II -- Tap all nonland permanents target opponent controls. They don't untap during their controller's next untap step.

III -- Gain control of target permanent an opponent controls. Untap it.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

This spell can't be countered.

At the beginning of each upkeep, create a 3/3 blue Serpent creature token named Koma's Coil.

Sacrifice another Serpent: Choose one --

• Tap target permanent. Its activated abilities can't be activated this turn.

• Koma, Cosmos Serpent gains indestructible until end of turn.

{T}: Add {G}.

{T}: You may put a land card from your hand onto the battlefield.

({T}: Add {U}.)

Mystic Sanctuary enters the battlefield tapped unless you control three or more other Islands.

When Mystic Sanctuary enters the battlefield untapped, you may put target instant or sorcery card from your graveyard on top of your library.

Search your library for up to two basic Forest cards, reveal those cards, and put one onto the battlefield tapped and the rest into your hand. Then shuffle.

Spell mastery -- If there are two or more instant and/or sorcery cards in your graveyard, search your library for up to three basic Forest cards instead of two.

Mutate {G}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

{1}, {T}: Look at the top card of your library. If it's a land card, you may put it onto the battlefield. If you don't put the card onto the battlefield, put it into your hand.

Flash

This spell can't be countered.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Return three lands you control to their owner's hand: Return Pearl Lake Ancient to its owner's hand.

You have no maximum hand size.

{T}: Add {C}.

Exile target artifact or creature. Its controller creates a 4/4 blue and red Elemental creature token.

Trample, ward {2}

At the beginning of each combat, if Reservoir Kraken is untapped, any opponent may tap an untapped creature they control. If they do, tap Reservoir Kraken and create a 1/1 blue Fish creature token with "This creature can't be blocked."

Landfall -- Whenever a land enters the battlefield under your control, choose one --

• You may tap or untap target creature.

• Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

{T}: You may put a land card from your hand onto the battlefield.

When Scourge of Fleets enters the battlefield, return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control.

Search your library for a basic land card, put it onto the battlefield, then shuffle.

Suspend 2--{G} (Rather than cast this card from your hand, you may pay {G} and exile it with two time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)

Krakens, Leviathans, Octopuses, and Serpents you control can't be blocked except by Krakens, Leviathans, Octopuses, and Serpents.

{6}{U}{U}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)

When Shipbreaker Kraken becomes monstrous, tap up to four target creatures. Those creatures don't untap during their controllers' untap steps for as long as you control Shipbreaker Kraken.

Choose one --

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

• Permanents you control gain hexproof until end of turn.

• Return target creature to its owner's hand.

Simic Growth Chamber enters the battlefield tapped.

When Simic Growth Chamber enters the battlefield, return a land you control to its owner's hand.

{T}: Add {G}{U}.

{T}: You may put a land card from your hand onto the battlefield. Activate only as a sorcery.

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.)

When Slinn Voda, the Rising Deep enters the battlefield, if it was kicked, return all creatures to their owners' hands except for Merfolk, Krakens, Leviathans, Octopuses, and Serpents.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Whenever a Kraken, Leviathan, Octopus, or Serpent you control deals combat damage to a player, create a 9/9 blue Kraken creature token.

Hexproof

Lieutenant -- As long as you control your commander, Stormsurge Kraken gets +2/+2 and has "Whenever Stormsurge Kraken becomes blocked, you may draw two cards."

Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life and draw a card.

You may return three Islands you control to their owner's hand rather than pay this spell's mana cost.

Counter target spell.

Whenever you draw a card, you may pay {1}. When you do, you may tap or untap target creature.

Return a land you control to its owner's hand: Untap Trench Behemoth. It gains hexproof until end of turn.

Landfall -- Whenever a land enters the battlefield under your control, target creature an opponent controls attacks during its controller's next combat phase if able.

Choose target artifact or enchantment. Its owner shuffles it into their library.

Draw three cards. You may play an additional land this turn.

{T}: You may put a land card from your hand onto the battlefield.

Return all creatures to their owners' hands except for Krakens, Leviathans, Octopuses, and Serpents.

{1}, {T}: You may put a land card from your hand onto the battlefield tapped.

{4}, {T}: Draw a card. If you control eight or more lands, draw two cards instead.