Return all attacking creatures to their owner's hand.

For each attacking creature, its owner puts it on their choice of the top or bottom of their library.

Create a token that's a copy of target creature you control. Flashback {5}{U}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Counter target spell.

Return all nonland permanents with mana value X or less to their owners' hands.

Copy target instant or sorcery spell, then return it to its owner's hand. You may choose new targets for the copy.

Counter target noncreature spell.

Counter target spell. Foretell {1}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

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

Whenever a creature you control deals combat damage to a player, you may draw a card. {1}{U}, {T}: Creatures your opponents control attack this turn if able.

Equipped creature gets +1/+1 for each land you control. Equip legendary creature {3} Equip {7}

As this artifact enters, choose a color. Creatures you control of the chosen color get +1/+1. Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.

Equipped creature gets +10/+10 and loses flying. Equip {8} ({8}: Attach to target creature you control. Equip only as a sorcery.)

Equipped creature gets +3/+3 and has protection from each color that's not in your commander's color identity. Equip commander {3} Equip {5}

No more than two creatures can attack you each combat.

Equipped creature has double strike. (It deals both first-strike and regular combat damage.) Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

As this artifact enters, choose a color. Creatures of the chosen color get +1/+1. Whenever a basic land is tapped for mana of the chosen color, its controller adds an additional one mana of that color.

Equipped creature gets +2/+2 and has infect. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Whenever Grafted Exoskeleton becomes unattached from a permanent, sacrifice that permanent. Equip {2}

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip {0}

Equipped creature gets +3/+0 and has trample and lifelink. Equip {3}

This spell costs {X} less to cast, where X is the total mana value of noncreature artifacts you control. Sacrifice two artifacts: Return this card from your graveyard to your hand.

Nyx Lotus enters tapped. {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

As this artifact enters, choose a creature type. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

Equipped creature gets +1/+1 and has trample and lifelink. {1}: Permanents your opponents control lose hexproof and indestructible until end of turn. Equip {2}

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

Equipped creature gets +1/+1 for each other creature you control that shares a creature type with it. Equip {2}

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and {T} no matter when it came under your control.) Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Equipped creature gets +2/+2 and has protection from green and from white. Whenever equipped creature deals combat damage to a player, exile up to one target creature you own, then search your library for a basic land card. Put both cards onto the battlefield under your control, then shuffle. Equip {2}

Equipped creature gets +2/+0 and has first strike, vigilance, trample, and haste. Equip {3}

Equipped creature has nonbasic landwalk. (It can't be blocked as long as defending player controls a nonbasic land.) Equip {2}

Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell.

{2}, {T}, Sacrifice this artifact: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

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

({T}: Add {U}.)

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

Blue creatures you control can't be blocked.

{T}, Discard your hand, Sacrifice this creature: Add three mana of any one color. Activate only as an instant.

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) When Emry enters, mill four cards. {T}: Choose target artifact card in your graveyard. You may cast that card this turn. (You still pay its costs. Timing rules still apply.)

Spells your opponents cast that target a Merfolk you control cost {2} more to cast. Abilities your opponents activate that target a Merfolk you control cost {2} more to activate.

Creatures you control have flying.

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

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

Other Merfolk creatures you control get +1/+1. {T}: Target Merfolk creature can't be blocked this turn.

Other Merfolk creatures you control get +1/+1. Whenever you cast a Merfolk spell, you may tap or untap target permanent.

This creature can't be blocked.

Flying {T}: Add one mana of any color.

({U/P} can be paid with either {U} or 2 life.) You may have this creature enter as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.

This creature can't be blocked. Whenever another Merfolk you control enters, this creature gets +1/+1 until end of turn.

Whenever a Merfolk you control deals combat damage to a player, draw a card.

This creature has flying as long as you control another Merfolk.

No more than one creature can attack each combat. No more than one creature can block each combat.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Merfolk spells and Wizard spells you cast cost {1} less to cast.

{T}: Target Merfolk creature gets +1/+1 and gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.) {T}: Target land becomes an Island until end of turn.

Flash Flying When this creature enters, choose up to one target creature spell or planeswalker spell. Its owner puts it on their choice of the top or bottom of their library. Evoke—Exile a blue card from your hand.

Indestructible As long as your devotion to blue is less than five, Thassa isn't a creature. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) At the beginning of your upkeep, scry 1. {1}{U}: Target creature you control can't be blocked this turn.

Each opponent mills fourteen cards. Cycling {1}{U} ({1}{U}, Discard this card: Draw a card.) When you cycle this card, each opponent mills four cards.

Enchant creature Enchanted creature gets +1/+0 and can't be blocked.

Enchant creature Enchanted creature can't be blocked. Whenever enchanted creature attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Enchant creature Whenever enchanted creature deals damage to an opponent, you may draw a card.

Whenever you cast a Merfolk spell, create a 1/1 blue Merfolk creature token with hexproof. (A creature with hexproof can't be the target of spells or abilities your opponents control.)

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

Enchant creature Enchanted creature gets +2/+2 and is goaded. (It attacks each combat if able and attacks a player other than you if able.) Whenever enchanted creature attacks, you scry 2.

Whenever a creature you control deals combat damage to a player, you may draw a card. Cycling {2} ({2}, Discard this card: Draw a card.)