Destroy target land.

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

When this creature enters, return target creature an opponent controls to its owner's hand. That creature's owner can't cast spells with the same name as that creature until your next turn.

Jeska enters with a loyalty counter on her for each time you've cast a commander from the command zone this game.
0: Choose target creature. Until your next turn, if that creature would deal combat damage to one of your opponents, it deals triple that damage to that player instead.
−X: Jeska deals X damage to each of up to three targets.
Jeska, Thrice Reborn can be your commander.
Partner

When this enchantment enters, target creature phases out until this enchantment leaves the battlefield. Tap that creature as it phases in this way. (Auras and Equipment phase out with it. While permanents are phased out, they're treated as though they don't exist.)

Indestructible
Equipped creature has indestructible.
Equip

Whenever a nontoken creature you control dies, this creature deals 1 damage to you and you draw a card.

Sliver creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."

Nonbasic lands are Mountains.

Tap an untapped Wizard you control: Counter target spell unless its controller pays .

During your turn, this creature has first strike.
Whenever another creature dies, this creature deals 1 damage to target player or planeswalker.

When you cast this spell, reveal the top fourteen cards of your library. Put all Doctor cards revealed this way into your graveyard and the rest on the bottom of your library in a random order.
You may have The Fourteenth Doctor enter as a copy of a Doctor card in your graveyard that was put there from your library this turn. If you do, it gains haste until end of turn.

, , Sacrifice this creature: Each player discards their hand, then draws seven cards.

Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)
Other Zombies have ": Regenerate this permanent."

As this artifact enters, choose a creature type.
Creatures you control of the chosen type get +1/+1.
: Add one mana of any color.

Artifact, instant, and sorcery spells your opponents cast cost more to cast.
−1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls.

: Add .
As this artifact enters, you may have it become a copy of any creature on the battlefield until end of turn, except it has haste.

Enchant creature
Enchanted creature gets +1/+1, has deathtouch, and is goaded. (It attacks each combat if able and attacks a player other than you if able.)
When enchanted creature dies, return this card to the battlefield at the beginning of the next end step.

Sliver creatures you control have haste. (They can attack and as soon as they come under your control.)

All Sliver creatures have "This creature gets +1/+1 as long as you control a Swamp."
All Slivers have ": Regenerate this permanent." (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Other Zombie creatures get +1/+1.
, : Return target Zombie card from your graveyard to your hand.

Whenever a player sacrifices a permanent, this creature deals 1 damage to any target.

( represents colorless mana.)
When this creature dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with mana value 3 or less. Otherwise, put that card into your hand.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this token: Draw a card.")

You may have this enchantment enter as a copy of an enchantment you control, except it has "At the beginning of your upkeep, you may exile this enchantment. If you do, return it to the battlefield under its owner's control."

Destroy target artifact or creature. It can't be regenerated.

You may cast creature spells as though they had flash.
+1: Until your next turn, up to one target creature gains vigilance and reach.
−2: Look at the top three cards of your library. Exile one face down and put the rest on the bottom of your library in any order. For as long as it remains exiled, you may cast it if it's a creature spell.

All Slivers have "Sacrifice this permanent: Add ."

Delayed Blast Fireball deals 2 damage to each opponent and each creature they control. If this spell was cast from exile, it deals 5 damage to each opponent and each creature they control instead.
Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Whenever another Elf you control enters, put a +1/+1 counter on Marwyn.
: Add an amount of equal to Marwyn's power.

Whenever this creature or another Elemental you control enters, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand.

Sliver creatures you control have ": Untap this creature."

Tap another untapped Merfolk you control: Kumena can't be blocked this turn.
Tap three untapped Merfolk you control: Draw a card.
Tap five untapped Merfolk you control: Put a +1/+1 counter on each Merfolk you control.

Each creature you control with a +1/+1 counter on it has ": Add one mana of any color."
−1: Put a +1/+1 counter on target creature.

Choose one —
• Counter target spell.
• Target player draws two cards.
• Gain control of target nonland permanent with mana value 1 or less.

You may have this artifact enter as a copy of any artifact on the battlefield.