Wintermoon Mesa enters tapped.
: Add .
, , Sacrifice Wintermoon Mesa: Tap two target lands.

Basic lands each player controls have shroud as long as that player controls three or fewer lands. (They can't be the targets of spells or abilities.)

Whenever a player puts a nontoken creature onto the battlefield, that player returns a land they control to its owner's hand.

Each player creates a green Elephant creature token. Those creatures have "This creature's power and toughness are each equal to the number of creature cards in its controller's graveyard."

Target player reveals their hand. You choose an instant or sorcery card from it and exile that card. You may cast that card for as long as it remains exiled. At the beginning of the next end step, if you haven't cast the card, return it to its owner's hand.

At the beginning of your upkeep, you may exile a land card from your graveyard. If you do, put a +1/+1 counter on target creature.

Veteran Brawlers can't attack if defending player controls an untapped land.
Veteran Brawlers can't block if you control an untapped land.

Unless any player pays , search your library for a card, put that card into your hand, then shuffle.

Mercenary Informer can't be the target of black spells or abilities from black sources.
: Put target nontoken Mercenary on the bottom of its owner's library.

: Prevent the next 1 damage that would be dealt to target creature this turn. Any player may activate this ability.

Rebel Informer can't be the target of white spells or abilities from white sources.
: Put target nontoken Rebel on the bottom of its owner's library.

Reorder your graveyard at random. An opponent chooses a card at random in your graveyard. If it's a creature card, put it onto the battlefield. Otherwise, exile it.

When there are no creatures on the battlefield, sacrifice Task Mage Assembly.
: Task Mage Assembly deals 1 damage to target creature. Any player may activate this ability but only as a sorcery.

Celestial Convergence enters with seven omen counters on it.
At the beginning of your upkeep, remove an omen counter from Celestial Convergence. If there are no omen counters on Celestial Convergence, the player with the highest life total wins the game. If two or more players are tied for highest life total, the game is a draw.

Flying
At the beginning of your end step, tap all lands you control.

Whenever Fickle Efreet attacks or blocks, flip a coin at end of combat. If you lose the flip, an opponent gains control of Fickle Efreet.

You can't untap more than one land during your untap step.

, Sacrifice a land: Create two 1/1 green Squirrel creature tokens.
, Sacrifice a land: Squirrel creatures get +1/+1 until end of turn.

When Keldon Firebombers enters, each player sacrifices all lands they control except for three.

, , Discard two cards: Latulla, Keldon Overseer deals X damage to any target.

Protection from white
At the beginning of your upkeep, sacrifice Bog Elemental unless you sacrifice a land.

Trample
Keldon Battlewagon can't block.
When Keldon Battlewagon attacks, sacrifice it at end of combat.
Tap an untapped creature you control: Keldon Battlewagon gets +X/+0 until end of turn, where X is the power of the creature tapped this way.

Flying
, Sacrifice X lands: Put X +1/+1 counters on Copper-Leaf Angel.

As Heightened Awareness enters, discard your hand.
At the beginning of your draw step, draw an additional card.

, , Discard two cards: All lands target player controls become 3/3 creatures until end of turn. They're still lands.

, , Discard two cards: Destroy all creatures except for Mageta the Lion. Those creatures can't be regenerated.

Flying
Sacrifice two lands: Jeweled Spirit gains protection from artifacts or from the color of your choice until end of turn.

, , Discard two cards: Target player discards X cards at random.

, , Discard two cards: Return X target creatures to their owners' hands.

Sacrifice two lands: Return Coffin Puppets from your graveyard to the battlefield. Activate only during your upkeep and only if you control a Swamp.

At the beginning of your end step, if you control no untapped lands, draw a card.

At the beginning of each player's upkeep, that player mills a card. Then they create X 1/1 black Minion creature tokens, where X is the milled card's mana value.

Whenever a nontoken creature enters, its controller creates a token that's a copy of that creature.
Whenever a nontoken creature leaves the battlefield, exile all tokens with the same name as that creature.
When Dual Nature leaves the battlefield, exile all tokens created with Dual Nature.

Whenever Shrouded Serpent attacks, defending player may pay . If that player doesn't, Shrouded Serpent can't be blocked this turn.

If there are ten or more creature cards total in all graveyards, this spell costs less to cast.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
: Destroy target creature. It can't be regenerated.

If you have 3 or less life, this spell costs less to cast.
Flying
Avatar of Hope can block any number of creatures.