As this land enters, you may reveal an Elemental card from your hand. If you don't, this land enters tapped.
: Add .
, : Target creature gains haste until end of turn.

This artifact enters with X charge counters on it.
: Choose a color. Add one mana of that color for each charge counter on this artifact.

: Add one mana of any color that a land an opponent controls could produce.

: Add .
: Add or . This land deals 1 damage to you.

(: Add .)
As this land enters, you may reveal a Treefolk card from your hand. If you don't, this land enters tapped.
: Add or . This land deals 1 damage to you.

, : Add .

As this land enters, you may reveal a Giant card from your hand. If you don't, this land enters tapped.
: Add or .

, : Add .

Join forces — Starting with you, each player may pay any amount of mana. Each player draws X cards, where X is the total amount of mana paid this way.

If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.

: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.

Join forces — Starting with you, each player may pay any amount of mana. Each player mills X cards, where X is the total amount of mana paid this way.

Earthquake deals X damage to each creature without flying and each player.

Equipped creature has myriad. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)
Equip

Magmaquake deals X damage to each creature without flying and each planeswalker.

Haste
Whenever Skullbriar deals combat damage to a player, put a +1/+1 counter on it.
Counters remain on Skullbriar as it moves to any zone other than a player's hand or library.

This creature enters with three +1/+1 counters on it if you didn't cast it from your hand.
When this creature dies, exile it with three time counters on it and it gains suspend. (At the beginning of its owner's upkeep, they remove a time counter. When the last is removed, they may cast this card without paying its mana cost. It has haste.)

Starstorm deals X damage to each creature.
Cycling (, Discard this card: Draw a card.)

Red spells you cast cost less to cast.

: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on this creature and you gain 1 life.

Impact Resonance deals X damage divided as you choose among any number of target creatures, where X is the greatest amount of damage dealt by a source to a permanent or player this turn.

Flying
When this creature dies, return another target artifact card from your graveyard to your hand.

Whenever one or more creatures attack, you may have target attacking creature gain double strike until end of turn.

Reveal the top ten cards of your library. Starting with the next opponent in turn order, each opponent chooses a different nonland card from among them. Put the chosen cards into your hand and the rest on the bottom of your library in a random order.

Whenever an opponent casts a spell, that player mills two cards.

, : Draw a card, then discard a card.

Flash
When this creature enters, copy target instant or sorcery spell. You may choose new targets for the copy.

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

At the beginning of your upkeep, put a +1/+1 counter on this creature.
At the beginning of your end step, destroy each creature with mana value equal to the number of +1/+1 counters on this creature.
Dredge 2 (If you would draw a card, you may mill two cards instead. If you do, return this card from your graveyard to your hand.)

Whenever a creature attacks you or a planeswalker you control, that creature's controller mills two cards.

Changeling (This card is every creature type.)
Whenever an opponent casts a spell, you may put a +1/+1 counter on this creature.

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

Reyhan enters with three +1/+1 counters on it.
Whenever a creature you control dies or is put into the command zone, if it had one or more +1/+1 counters on it, you may put that many +1/+1 counters on target creature.
Partner (You can have two commanders if both have partner.)

As this artifact enters, choose a creature type.
Creature spells of the chosen type cost less to cast.

, : Put a fate counter on target permanent.
, , Sacrifice this artifact: Destroy each nonland permanent without a fate counter on it, then remove all fate counters from all permanents.

Creatures with power less than this creature's power can't block creatures you control.
Whenever another creature you control enters, put a +1/+1 counter on this creature.