Defender (This creature can't attack.)

When Coral Barrier enters the battlefield, create a 1/1 blue Squid creature token with islandwalk. (It can't be blocked as long as defending player controls an Island.)

Whenever a Sliver creature you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {2}.

Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Draw two cards.

Enchant artifact or creature

Enchanted permanent doesn't untap during its controller's untap step and its activated abilities can't be activated.

Enchant artifact

Enchanted artifact is a creature with base power and toughness 5/5 in addition to its other types.

When Frost Lynx enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Glacial Crasher can't attack unless there is a Mountain on the battlefield.

Target creature gets -5/-0 until end of turn.

Cast this spell only if you've cast another spell this turn.

Flying

Return up to two target creatures to their owners' hands.

Enchant creature

Enchanted creature can't be blocked except by Walls.

+1: Look at the top two cards of your library. Put one of them into your graveyard.

−3: Return another target nonland permanent to its owner's hand.

−8: Each player shuffles their hand and graveyard into their library. You draw seven cards.

Draw three cards.

{2}{U}, {T}, Sacrifice another creature: Reveal cards from the top of your library until you reveal a nonlegendary creature card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.

Jorubai Murk Lurker gets +1/+1 as long as you control a Swamp.

{1}{B}: Target creature gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Flying

Whenever Kapsho Kitefins or another creature enters the battlefield under your control, tap target creature an opponent controls.

Flying

Whenever Master of Predicaments deals combat damage to a player, choose a card in your hand. That player guesses whether the card's mana value is greater than 4. If the player guessed wrong, you may cast the card without paying its mana cost.

You may have Mercurial Pretender enter the battlefield as a copy of a creature you control, except it has "{2}{U}{U}: Return this creature to its owner's hand."

Whenever you attack with two or more creatures, draw a card.

Target opponent mills seven cards.

Counter target noncreature spell.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Other blue creatures you control get +1/+1.

{U}, {T}: Another target blue creature you control gains flying until end of turn.

Return target creature you control and target creature you don't control to their owners' hands.

Until end of turn, each creature target player controls loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Flash (You may cast this spell any time you could cast an instant.)

Flying

When Quickling enters the battlefield, sacrifice it unless you return another creature you control to its owner's hand.

{3}{U}, {T}: Draw a card, then discard a card.

Flying

{5}{U}{U}: Draw a card for each color among permanents you control.

{5}{U}{U}, Exile Soul of Ravnica from your graveyard: Draw a card for each color among permanents you control.

Counter target spell. If you control a blue creature, draw a card, then discard a card.

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.

Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Return target nonland permanent to its owner's hand.

Defender

Whenever Wall of Frost blocks a creature, that creature doesn't untap during its controller's next untap step.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Welkin Tern can block only creatures with flying.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

When Black Cat dies, target opponent discards a card at random.

{1}{B}, Sacrifice another creature: Put a +1/+1 counter on Blood Host and you gain 2 life.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Carrion Crow enters the battlefield tapped.

Enchant land

Enchanted land has "{T}: Target player loses 3 life."

Lifelink

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Covenant of Blood deals 4 damage to any target and you gain 4 life.

Enchant creature

Enchanted creature gets -1/-1 and can't block.

{B}, {T}, Pay 1 life: Put a +1/+1 counter on Cruel Sadist.

{2}{B}, {T}, Remove X +1/+1 counters from Cruel Sadist: It deals X damage to target creature.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Put target creature card from a graveyard onto the battlefield under your control.

Enchant creature

Enchanted creature has lifelink and "Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature." (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

At the beginning of each upkeep, if an opponent lost life last turn, put a +1/+1 counter on target creature you control.