Whenever you crank Hard Hat Area, roll two six-sided dice. Hard Hat Area assembles a number of Contraptions equal to the difference between those results. (To assemble a Contraption, put the top card of your Contraption deck face up onto one of your sprockets.)

: Add .

, Pay 1 life: Add .

, , Sacrifice a Desert: Target creature gets +3/+3 until end of turn. Activate only as a sorcery.

: Add .

, , Sacrifice Haunted Fengraf: Return a creature card at random from your graveyard to your hand.

Visit — Return target creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of your next end step.

Lights — 4, 6

Haunted Ridge enters the battlefield tapped unless you control two or more other lands.

: Add or .

Havenwood Battleground enters the battlefield tapped.

: Add .

, Sacrifice Havenwood Battleground: Add .

: Add .

, : Add one mana of any color.

, , Tap an untapped Gate you control: Create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

(: Add or .)

Hedge Maze enters the battlefield tapped.

When Hedge Maze enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

You may cast spells as though they had flash.

Spells you cast cost less to cast for each card your opponents have drawn this turn.

: Add .

, : Put a pressure counter on Hellion Crucible.

, , Remove two pressure counters from Hellion Crucible and sacrifice it: Create a 4/4 red Hellion creature token with haste. (It can attack and as soon as it comes under your control.)

: Add .

Hickory Woodlot enters the battlefield tapped with two depletion counters on it.

, Remove a depletion counter from Hickory Woodlot: Add . If there are no depletion counters on Hickory Woodlot, sacrifice it.

Hidden Courtyard enters the battlefield tapped.

: Add .

, , Sacrifice Hidden Courtyard: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Hidden Nursery enters the battlefield tapped.

: Add .

, , Sacrifice Hidden Nursery: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Menace (This creature can't be blocked except by two or more creatures.)

When this creature transforms into Hideous Fleshwheeler, put target permanent card with mana value 2 or less from a graveyard onto the battlefield under your control.

(: Add or .)

Highland Forest enters the battlefield tapped.

Highland Weald enters the battlefield tapped.

: Add or .

Hinterland Scourge must be blocked if able.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Hinterland Scourge.

If you control two or more other lands, Hive of the Eye Tyrant enters the battlefield tapped.

: Add .

: Until end of turn, Hive of the Eye Tyrant becomes a 3/3 black Beholder creature with menace and "Whenever this creature attacks, exile target card from defending player's graveyard." It's still a land.

Hollow Trees enters the battlefield tapped.

You may choose not to untap Hollow Trees during your untap step.

At the beginning of your upkeep, if Hollow Trees is tapped, put a storage counter on it.

, Remove any number of storage counters from Hollow Trees: Add for each storage counter removed this way.

Whenever equipped creature attacks, put a +1/+1 counter on that creature and each other creature you control that shares a creature type with it.

Equip

At the beginning of your end step, if Homicidal Brute didn't attack this turn, tap Homicidal Brute, then transform it.

, Pay 1 life: Add or .

, , Sacrifice Horizon Canopy: Draw a card.

: Add .

, Exile a land card from your graveyard: Hostile Desert becomes a 3/4 Elemental creature until end of turn. It's still a land.

Creatures with power less than Howling Chorus's power can't block it.

Whenever Howling Chorus deals combat damage to a player, create a 3/2 colorless Eldrazi Horror creature token.

Whenever a permanent you control is dealt damage, Howlpack Avenger deals that much damage to any target.

: Howlpack Avenger gets +2/+0 until end of turn.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Hideaway 4 (When this land enters the battlefield, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)

Howltooth Hollow enters the battlefield tapped.

: Add .

, : You may play the exiled card without paying its mana cost if each player has no cards in hand.

Suspend 3—

Starting with you, each player may put an artifact, creature, enchantment, or land card from their hand onto the battlefield. Repeat this process until no one puts a card onto the battlefield.

Icatian Store enters the battlefield tapped.

You may choose not to untap Icatian Store during your untap step.

At the beginning of your upkeep, if Icatian Store is tapped, put a storage counter on it.

, Remove any number of storage counters from Icatian Store: Add for each storage counter removed this way.

(: Add or .)

Ice Tunnel enters the battlefield tapped.

(: Add or .)

Idyllic Beachfront enters the battlefield tapped.

: Add .

, Pay 1 life: Add .

, , Sacrifice a Desert: Put two -1/-1 counters on target creature an opponent controls. Activate only as a sorcery.

Flying

(: Add , , or .)

Indatha Triome enters the battlefield tapped.

Cycling (, Discard this card: Draw a card.)

Enchant player

Spells you cast that target enchanted player cost less to cast.

At the beginning of enchanted player's upkeep, that player loses 1 life and you gain 1 life.

Whenever you crank Inflation Station, target creature gets +3/+3 until end of turn.

Visit — Draw a card.

Lights — 3, 6

Visit — Draw a card.

Lights — 5, 6

: Add .

: Inkmoth Nexus becomes a 1/1 Phyrexian Blinkmoth artifact creature with flying and infect until end of turn. It's still a land. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Hexproof, indestructible

Insidious Mist can't block and can't be blocked.

Whenever Insidious Mist attacks and isn't blocked, you may pay . If you do, transform it.

Whenever you crank Insufferable Syphon, target player discards a card.

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life.

: Add .

, , Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

: Add .

, Pay 1 life: Add .

, , Sacrifice a Desert: Target player mills four cards.

(: Add or .)

Irrigated Farmland enters the battlefield tapped.

Cycling (, Discard this card: Draw a card.)

Isolated Chapel enters the battlefield tapped unless you control a Plains or a Swamp.

: Add or .

First strike, trample, lifelink

Izzet Boilerworks enters the battlefield tapped.

When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand.

: Add .

+1: Up to one target creature gets -2/-0 until your next turn.

−3: You may cast target instant or sorcery card from your graveyard this turn. If that spell would be put into your graveyard, exile it instead.

−9: You get an emblem with "Whenever you cast a spell, target opponent mills five cards."

Jagged Barrens enters the battlefield tapped.

When Jagged Barrens enters the battlefield, it deals 1 damage to target opponent.

: Add or .