, Sacrifice a blue creature: Create X 1/1 blue Camarid creature tokens, where X is the sacrificed creature's mana value.

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

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.")

Each Sliver card in each player's hand has slivercycling .

Slivercycling (, Discard this card: Search your library for a Sliver card, reveal it, put it into your hand, then shuffle.)

At the beginning of your upkeep, Honden of Infinite Rage deals damage to any target equal to the number of Shrines you control.

At the beginning of your upkeep, target opponent discards a card for each Shrine you control.

When Honest Rutstein enters, return target creature card from your graveyard to your hand.

Creature spells you cast cost less to cast.

: Add one mana of any color.

, : Exile target card from a graveyard.

When Hooded Assassin enters, choose one —

• Put a +1/+1 counter on Hooded Assassin.

• Destroy target creature that was dealt damage this turn.

Return target artifact, enchantment, or land to its owner's hand.

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.

Flying

If Hook-Haunt Drifter would be put into a graveyard from anywhere, exile it instead.

Create three 1/1 white Rabbit creature tokens.

Flying

Sacrifice Hope of Ghirapur: Until your next turn, target player who was dealt combat damage by Hope of Ghirapur this turn can't cast noncreature spells.

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.

When Hopeless Nightmare enters, each opponent discards a card and loses 2 life.

When Hopeless Nightmare is put into a graveyard from the battlefield, scry 2.

: Sacrifice Hopeless Nightmare.

Vigilance, trample, haste

: You may play target Elemental card from your graveyard without paying its mana cost.

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.

Flash

Flying, trample

Whenever you draw a card, you gain 1 life.

, 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.

Whenever you cast a Spirit or Arcane spell, regenerate target creature.

, , Sacrifice Horizon Spellbomb: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

When Horizon Spellbomb is put into a graveyard from the battlefield, you may pay . If you do, draw a card.

, : Prevent all combat damage that would be dealt by target creature this turn.

Hornet Sting deals 1 damage to any target.

If you control a Swamp, destroy target nonblack creature.

Splice onto Arcane—Exile four cards from your graveyard. (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Devoid (This card has no color.)

Counter target creature spell with mana value 4 or less. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Target creature gains deathtouch and indestructible until end of turn.

Target player discards a card, then mills a card.

Return up to two target creatures to their owners' hands. Scry 1. The Ring tempts you.

: 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.

When Hostile Investigator enters, target opponent discards a card.

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

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.

Up to one target creature has base power and toughness 1/1 until end of turn. Up to one other target creature has base power and toughness 4/4 until end of turn. Then Hostile Takeover deals 3 damage to each creature.

You have ten seconds to look at and rearrange the cards in your library. At the end of those ten seconds, if you're touching one or more of those cards, shuffle.

Enchant land you control

Enchanted land has ": Prevent the next 1 damage that would be dealt to any target this turn."

When Hotshot Investigators enters, return up to one other target creature to its owner's hand. If you controlled it, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

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.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Destroy all nontoken creatures.

, : Target creature doesn't untap during its controller's next untap step.

, : Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Flying

Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

: Put target card from a graveyard on the bottom of its owner's library.

Return CARDNAME to its owner's hand.

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

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.)

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.

Howling Gale deals 1 damage to each creature with flying and each player.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Reach (This creature can block creatures with flying.)

When Howling Giant enters, create two 2/2 green Wolf creature tokens.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

When Howling Wolf enters, you may search your library for up to three cards named Howling Wolf, reveal them, put them into your hand, then shuffle.

: Put target creature card from your graveyard on top of your library. Activate only during your turn, before attackers are declared.

When Huatli, Poet of Unity enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.

: Exile Huatli, then return her to the battlefield transformed under her owner's control. Activate only as a sorcery.