Each player may play an additional land on each of their turns. At the beginning of each player's upkeep, if that player has no cards in hand, that player draws three cards.

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

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

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.

Deep-Sea Kraken can't be blocked. Suspend 9—{2}{U} (Rather than cast this card from your hand, you may pay {2}{U} and exile it with nine time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.) Whenever an opponent casts a spell, if Deep-Sea Kraken is suspended, remove a time counter from it.

Whenever a creature deals combat damage to one of your opponents, its controller may draw a card.

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.

{U}, {T}: Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

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.)

Whenever Lorthos, the Tidemaker attacks, you may pay {8}. If you do, tap up to eight target permanents. Those permanents don't untap during their controllers' next untap steps.

At the beginning of each player's precombat main phase, that player adds {G}{G}.

Flying Nimbus Swimmer enters the battlefield with X +1/+1 counters on it.

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.

Realm Seekers enters the battlefield with X +1/+1 counters on it, where X is the total number of cards in all players' hands. {2}{G}, Remove a +1/+1 counter from Realm Seekers: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Sacrifice Sakura-Tribe Elder: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

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.

Flying, trample Shroud (This creature can't be the target of spells or abilities.)

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.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) All lands are Islands in addition to their other types. Creatures without flying or islandwalk can't attack.

Trample When Trench Gorger enters the battlefield, you may search your library for any number of land cards, exile them, then shuffle. If you do, Trench Gorger has base power and base toughness each equal to the number of cards exiled this way.

Tromokratis has hexproof unless it's attacking or blocking. Tromokratis can't be blocked unless all creatures defending player controls block it. (If any creature that player controls doesn't block this creature, it can't be blocked.)

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.

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Return all attacking creatures to their owner's hand.

Create X 1/2 green Spider creature tokens with reach, where X is the number of creatures attacking you. Prevent all combat damage that would be dealt this turn by non-Spider creatures.

Target player draws X cards. Shuffle Blue Sun's Zenith into its owner's library.

Return all creatures to their owners' hands.

Prevent all combat damage that would be dealt this turn.

Prevent all combat damage that would be dealt this turn. Cycling {3} ({3}, Discard this card: Draw a card.)

Prevent all combat damage that would be dealt this turn. Cycling {2} ({2}, Discard this card: Draw a card.)

Prevent all combat damage that would be dealt this turn. Flashback {2}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Draw X cards, then discard a card.

Target player draws X cards.

Any number of target opponents each discard their hands, then draw seven cards. Draw a card.

{T}: Add {C}. {3}{G}, {T}, Sacrifice Blighted Woodland: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

({T}: Add {G} or {U}.) As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

{T}: Add one mana of any color in your commander's color identity.

({T}: Add {G}.)

Hinterland Harbor enters the battlefield tapped unless you control a Forest or an Island. {T}: Add {G} or {U}.

({T}: Add {U}.)

{T}: Add {C}. {4}, {T}: Target creature can't be blocked this turn.

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}.

Temple of Mystery enters the battlefield tapped. When Temple of Mystery enters the battlefield, scry 1. {T}: Add {G} or {U}.

{T}: Add {C}. {2}, {T}: Thespian's Stage becomes a copy of target land, except it has this ability.

Undaunted (This spell costs {1} less to cast for each opponent.) Return all nonland permanents to their owners' hands.

Join forces — Starting with you, each player may pay any amount of mana. Each player searches their library for up to X basic land cards, where X is the total amount of mana paid this way, puts them onto the battlefield tapped, then shuffles.

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.

Each player shuffles their hand and graveyard into their library, then draws seven cards. If it's your turn, end the turn. (Exile all spells and abilities from the stack, including this card. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

Return all nonland permanents to their owners' hands. Miracle {1}{U} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

If you control four or fewer lands, search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Cycling—Sacrifice a land. (Sacrifice a land, Discard this card: Draw a card.)

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Return all nonblue creatures to their owners' hands.

Search your library for a Forest card, put that card onto the battlefield, then shuffle.

Each player may search their library for up to X basic land cards and put them onto the battlefield tapped. Then each player who searched their library this way shuffles.

Search your library for up to three basic land cards, put them onto the battlefield tapped, then shuffle. You gain 7 life.

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

Choose one — • Each player shuffles their hand and graveyard into their library. • Each player draws seven cards. Entwine {2} (Choose both if you pay the entwine cost.)

Tempting offer — Search your library for a land card and put it onto the battlefield. Each opponent may search their library for a land card and put it onto the battlefield. For each opponent who searches a library this way, search your library for a land card and put it onto the battlefield. Then each player who searched a library this way shuffles.

Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Time Reversal.

Exile Time Spiral. Each player shuffles their hand and graveyard into their library, then draws seven cards. You untap up to six lands.

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