This land enters tapped.
, : Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. Return this land to its owner's hand at the beginning of the next cleanup step.

: Target creature with flying has base power 0 until end of turn.

If this land would enter, sacrifice a Swamp instead. If you do, put this land onto the battlefield. If you don't, put it into its owner's graveyard.
: Add .
, Sacrifice a Swamp: Add .

, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness.

: Add one mana of any color. An opponent gains control of this land at the beginning of the next end step.

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

Cast this spell only before the combat damage step.
Target creature gains trample and gets +X/+0 until end of turn, where X is its power. At the beginning of the next end step, destroy that creature if it attacked this turn.

Cumulative upkeep—Have an opponent create a 1/1 red Survivor creature token. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Trample; rampage 1 (Whenever this creature becomes blocked, it gets +1/+1 until end of turn for each creature blocking it beyond the first.)

If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.

White creatures get +1/+1.

As long as this artifact is untapped, players can't untap more than one land during their untap steps.

At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.

Whenever a land enters, this artifact deals 2 damage to that land's controller.

Flying
At the beginning of your upkeep, this creature deals 1 damage to you.

, : Return target artifact card from your graveyard to your hand.

, : Return target creature card from your graveyard to your hand.

When this creature attacks or blocks, at end of combat, sacrifice it and it deals 5 damage to you.
, : Return target permanent that isn't enchanted to its owner's hand.

Whenever this creature blocks, flip a coin. If you lose the flip, remove this creature from combat and it can't block this turn. Creatures it was blocking that had become blocked by only this creature this combat become unblocked.

At the beginning of each end step, put a +1/+1 counter on this creature for each creature that died this turn.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

: The next time an unblocked creature of your choice would deal combat damage to you this turn, prevent all but 1 of that damage.

When Hecatomb enters, sacrifice Hecatomb unless you sacrifice four creatures.
Tap an untapped Swamp you control: Hecatomb deals 1 damage to any target.

You may choose not to untap this creature during your untap step.
: For as long as this creature remains tapped, gain control of target creature of an opponent's choice they control.

Each player loses a third of their life, then discards a third of the cards in their hand, then sacrifices a third of the creatures they control of their choice, then sacrifices a third of the lands they control of their choice. Round up each time.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Haste (This creature can attack and as soon as it comes under your control.)
At the beginning of the end step, sacrifice this creature.

Creatures without flying can't attack.

: You may put a Goblin permanent card from your hand onto the battlefield.
: Target Goblin gains protection from white until end of turn.

Each player shuffles their hand and graveyard into their library. You exile the top ten cards of your library. Then each player draws up to seven cards.

Flying
: This creature deals 1 damage to each creature with flying and each player. Any player may activate this ability.

When Lord of Tresserhorn enters, you lose 2 life, you sacrifice two creatures, and target opponent draws two cards.
: Regenerate Lord of Tresserhorn.

Whenever Márton Stromgald attacks, other attacking creatures get +1/+1 until end of turn for each attacking creature other than Márton Stromgald.
Whenever Márton Stromgald blocks, other blocking creatures get +1/+1 until end of turn for each blocking creature other than Márton Stromgald.

This artifact enters tapped.
, : Destroy all artifacts, creatures, and enchantments.

Green creatures you control get +0/+2.

At the beginning of each player's upkeep, this enchantment deals damage to that player equal to the number of nonbasic lands they control.

Destroy all lands.

Starting with you, each player may put a permanent card from their hand onto the battlefield. Repeat this process until no one puts a card onto the battlefield.