Processing Plant enters the battlefield tapped.
When Processing Plant enters the battlefield, you may put a card an opponent owns from exile into that player's graveyard. If you do, untap Processing Plant. Otherwise, exile the top card of each opponent's library.
: Add , , , or .

Forsaken Crossroads enters the battlefield tapped.
As Forsaken Crossroads enters the battlefield, choose a color.
When Forsaken Crossroads enters the battlefield, scry 1. If you weren't the starting player, you may untap Forsaken Crossroads instead.
: Add one mana of the chosen color.

, Sacrifice this artifact: Add one mana of any color.

: Add .
, : Exile the bottom card of target opponent's library.
Whenever one or more cards an opponent owns are put into exile, put a release counter on The Heron Moon. Then if it has thirteen or more release counters on it, sacrifice it and create a copy of Emrakul, the Promised End. Cast it without paying its mana cost.

, Sacrifice this artifact: Look at the top card of target player's library. Draw a card at the beginning of the next turn's upkeep.

(: Add .)

: Add .
, : Until end of turn, creatures your opponents control lose hexproof and shroud and can't have hexproof or shroud.

This land enters tapped.
When this land enters, exile target player's graveyard.
: Add .

(This land isn't a spell, it's affected by summoning sickness, and it has ": Add .")

Land casualty 2 (As this land enters, you may sacrifice a creature with power 2 or greater. If you do, create a token that's a copy of this land.)
Maestros' Totally Safe Hideout enters the battlefield tapped.
: Add , , or .

Value Town enters the battlefield tapped.
: Add or .

(: Add .)

: Add .
Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

(: Add .)
This land enters tapped unless you control three or more other Islands.
When this land enters untapped, you may put target instant or sorcery card from your graveyard on top of your library.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
: Add , , or . If you don't have the city's blessing, you lose 1 life.

: Add one mana of any color in your commander's color identity.

Sunburst (This artifact enters with a charge counter on it for each color of mana spent to cast it.)
, Sacrifice this artifact: Destroy each nonland permanent with mana value equal to the number of charge counters on this artifact.

Counter target spell.
At the beginning of your next upkeep, pay . If you don't, you lose the game.

: Add one mana of any color. You get two poison counters.

Target player discards X cards at random.

Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Counter target instant or sorcery spell unless its controller pays .
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

This creature gets +2/+2 as long as there are three or more land cards in your graveyard.
, , Sacrifice a land: Search your library for a land card, put it onto the battlefield tapped, then shuffle.

Destroy target artifact or enchantment. Its controller gains 4 life.

As this artifact enters, choose an opponent.
At the beginning of the chosen player's upkeep, this artifact deals X damage to that player, where X is the number of cards in their hand minus 4.

When Tenacious Pup enters the battlefield, you gain 1 life. You get a one-time boon with "When you cast a creature spell, that creature enters the battlefield with an additional +1/+1 counter, trample counter, and vigilance counter on it."

: This creature gets +2/+2 until end of turn. Activate only once each turn.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle this spell into its owner's library transformed. (For playtesting purposes, put it into its sleeve upside down.)

( can be paid with either or 2 life.)
Counter target spell with mana value 1.

Creatures with power 3 or greater don't untap during their controllers' untap steps.

Draw a card if an opponent has cast a blue or black spell this turn. Spells you control can't be countered this turn. You and permanents you control gain hexproof from blue and from black until end of turn. (You and they can't be the targets of blue or black spells or abilities your opponents control.)

This creature gets -X/-X, where X is your life total.

Haste
Whenever this creature attacks, defending player reveals the top card of their library. If it's a land card, that player puts it into their hand.