Put target artifact or enchantment on the bottom of its owner's library.

Devoid (This card has no color.)

When you cast this spell, for each opponent, gain control of up to one target creature that player controls until end of turn. Untap those creatures. They gain trample, haste, and annihilator 1 until end of turn.

Trample, haste, annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent.)

, Sacrifice a creature: Scry 2.

, : Exile the top card of your library. You may play that card this turn. When you exile a nonland card this way, Hidetsugu, Devouring Chaos deals damage equal to the exiled card's mana value to any target.

Frenzied Metabolism — As an additional cost to cast this spell, you may remove any number of +1/+1 counters from among creatures you control. This spell costs less to cast for each counter removed this way.

Vigilance, reach, ward

Titanic — Hierophant Bio-Titan can't be blocked by creatures with power 2 or less.

Each player can't cast more than one spell each turn.

, Sacrifice High Noon: It deals 5 damage to any target.

Flying

High Sentinels of Arashin gets +1/+1 for each other creature you control with a +1/+1 counter on it.

: Put a +1/+1 counter on target creature.

Flying

Whenever you cast a Spirit or Arcane spell, you may exile Hikari, Twilight Guardian. If you do, return it to the battlefield under its owner's control at the beginning of the next end step.

Target player reveals their hand. That player discards all nonland cards with the same name as another card in their hand.

Hinterland Harbor enters tapped unless you control a Forest or an Island.

: Add or .

, Discard a card: Counter target spell if it has the same mana value as the discarded card.

Whenever Historian's Boon or another nontoken enchantment you control enters, create a 1/1 white Soldier creature token.

Whenever the final chapter ability of a Saga you control triggers, create a 4/4 white Angel creature token with flying and vigilance.

Hithlain Rope can't be sacrificed.

, : Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. The player to your right gains control of Hithlain Rope.

, : Draw a card. The player to your right gains control of Hithlain Rope.

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

Creatures you control are Slivers in addition to their other creature types.

Flash (You may cast this spell any time you could cast an instant.)

Whenever a creature deals combat damage to you, if Hixus, Prison Warden entered this turn, exile that creature until Hixus leaves the battlefield. (That creature returns under its owner's control.)

Convoke

Flying

When Hoarding Broodlord enters, search your library for a card, exile it face down, then shuffle. For as long as that card remains exiled, you may play it.

Spells you cast from exile have convoke.

Flying

: Destroy target artifact. Hoard-Smelter Dragon gets +X/+0 until end of turn, where X is that artifact's mana value.

You can't spend mana to cast this spell.

Convoke, delve (Each creature you tap while casting this spell pays for or one mana of that creature's color. Each card you exile from your graveyard pays for .)

You may cast Hogaak, Arisen Necropolis from your graveyard.

Trample

Blocking creatures get +7/+7 until end of turn.

This spell costs less to cast for each card you've cycled or discarded this turn.

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

Hollow Trees enters 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.

Flash

At the beginning of your upkeep, for each creature you control that's a Wolf or a Werewolf, create a 2/2 green Wolf creature token.

, Exile Holographic Double from your hand: Choose a creature card in your hand. Conjure a duplicate of it into your hand.

: Tap target green creature.

Whenever one or more nontoken creatures you control die, investigate. This ability triggers only once each turn. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Creatures you control get +2/+2 and have flying and ": This creature gets +1/+0 until end of turn."

Exile all creature cards from all graveyards. You gain 1 life for each card exiled this way.

Trample

Embalm (, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Snake Hydra with no mana cost. Embalm only as a sorcery.)

Whenever you draw a card, you may put a hoofprint counter on Hoofprints of the Stag.

, Remove four hoofprint counters from Hoofprints of the Stag: Create a 4/4 white Elemental creature token with flying. Activate only during your turn.

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

, Remove two +1/+1 counters from among creatures you control: Destroy target artifact or enchantment.

Flying

Other Zombies you control have flying.

Whenever one or more Zombies you control deal combat damage to one or more of your opponents, you may draw cards equal to the number of opponents dealt damage this way. If you do, discard that many cards.

, Pay 1 life: Add one mana of any type that a land you control could produce.

, : You may put a land card from your hand onto the battlefield tapped.

, , Sacrifice Horizon of Progress: Draw a card.

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.)

Endless Swarm — Whenever a land you control enters, you may pay . If you do, return Hormagaunt Horde from your graveyard to your hand.

When Horn of Gondor enters, create a 1/1 white Human Soldier creature token.

, : Create X 1/1 white Human Soldier creature tokens, where X is the number of Humans you control.

Whenever a player casts a spell, they may pay . If the player does, they draw a card at the beginning of the next end step.

Whenever two or more creatures you control attack a player, look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flash

Ward

Horned Loch-Whale enters tapped unless it's your turn.

Flying, deathtouch

When Hornet Queen enters, create four 1/1 green Insect creature tokens with flying and deathtouch.

When Hostage Taker enters, exile another target creature or artifact until Hostage Taker leaves the battlefield. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast that spell.

Exile the top three cards of your library in a face-down pile, then exile the top three cards of your library in another face-down pile. Look at the cards in each pile, then turn a pile of your choice face up. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard. You lose 3 life.

Haste

If a spell you control would deal damage to an opponent, prevent that damage. Create a 3/1 red Elemental Shaman creature token with haste for each 1 damage prevented this way.

When Hostility is put into a graveyard from anywhere, shuffle it into its owner's library.

When Hot Pursuit enters, suspect target creature an opponent controls. As long as Hot Pursuit remains on the battlefield, that creature is also goaded.

At the beginning of combat on your turn, if two or more players have lost the game, gain control of all goaded and/or suspected creatures until end of turn. Untap them. They gain haste until end of turn.

Double strike

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Exile X target creature cards from your graveyard. For each card exiled this way, create a token that's a copy of that card, except it's a 4/4 black Zombie.

Search your library for up to two land cards, put them onto the battlefield tapped, then shuffle. Then if you control three or more Deserts, create two 2/2 black Zombie creature tokens.

This spell costs less to cast if there are ten or more nonland permanents on the battlefield.

Destroy all nonland permanents.

Flying

When Hoverguard Sweepers enters, you may return up to two target creatures to their owners' hands.

When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.

Raid — If you attacked this turn, when you next cast an instant or sorcery spell this turn, copy that spell an additional time. You may choose new targets for the copy.

At the beginning of combat on your turn, target Wolf or Werewolf you control gets +2/+2 until end of turn.

Whenever an opponent casts their second spell each turn, create a 2/2 green Wolf 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.)