When an opponent controls a creature with power 4 or greater, if Hidden Predators is an enchantment, Hidden Predators becomes a 4/4 Beast creature.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

(: Add or .)

Highland Forest enters tapped.

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

: Add or .

Whenever Historian of Zhalfir attacks, if you control a Teferi planeswalker, draw a card.

Enchant artifact or creature

When Historian's Wisdom enters, if enchanted permanent is a creature with the greatest power among creatures on the battlefield, draw a card.

As long as enchanted permanent is a creature, it gets +2/+1.

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.

Spirits you control get +1/+1 and have trample and haste.

Whenever another nontoken creature you control dies, exile it. If you do, create a token that's a copy of that creature, except it's a Spirit in addition to its other types and it has "When this creature leaves the battlefield, return the exiled card to its owner's graveyard."

Enchant creature or planeswalker

When Hold for Questioning enters, tap enchanted permanent and investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Enchanted permanent doesn't untap during its controller's untap step and its activated abilities can't be activated.

Hollow Warrior can't attack or block unless you tap an untapped creature you control not declared as an attacking or blocking creature this combat. (This cost is paid as attackers or blockers are declared.)

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.

When Homarid Explorer enters, target player mills four cards.

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.")

White creatures you control get +1/+1.

As an additional cost to cast this spell, discard a card.

Draw two cards. Amass Zombies 1. (Put a +1/+1 counter on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)

The next time a source of your choice would deal damage to any target this turn, prevent that damage. If damage from a red source is prevented this way, Honorable Passage deals that much damage to the source's controller.

Whenever Honored Crop-Captain attacks, other attacking creatures get +1/+0 until end of turn.

: Add one mana of any color.

, : Exile target card from a graveyard.

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.)

: Add .

Tap an untapped legendary permanent you control: Untap Honor-Worn Shaku.

Molting Exoskeleton — When Hook Horror dies, it perpetually gets -1/-1. Then if that card's toughness is 1 or greater, return it to the battlefield under its owner's control.

Whenever Horde Ambusher blocks, it deals 1 damage to you.

Morph—Reveal a red card in your hand. (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Horde Ambusher is turned face up, target creature can't block this turn.

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.

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.

When Hornbash Mentor enters, put a trample counter on target non-Human creature you control.

, : Put a +1/+1 counter on each creature you control with trample.

Whenever Horned Cheetah deals damage, you gain that much life.

When Horned Kavu enters, return a red or green creature you control to its owner's hand.

All Sliver creatures have trample.

: Regenerate Horned Troll.

Flying, haste

First strike

Defender (This creature can't attack.)

Whenever Hornet Nest is dealt damage, create that many 1/1 green Insect creature tokens with flying and deathtouch. (Any amount of damage a creature with deathtouch deals to a creature is enough to destroy it.)

Hornet Sting deals 1 damage to any target.

Flying

Whenever a creature becomes the target of a spell or ability, destroy that creature.

Rampage 1 <I>(Whenever this creature becomes blocked, it gets +1/+1 until end of turn for each creature blocking it beyond the first.)</I>

Lifelink

Whenever Horrid Shadowspinner attacks, you may draw cards equal to its power. If you do, discard that many cards.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. If you control an Eldrazi, you gain 3 life.

Sacrifice a Swamp: Regenerate target black creature. (The next time that creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

: Horror of the Dim gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

: Untap Horseshoe Crab.

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.")

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.