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.

Whenever a player casts an instant or sorcery spell, each other player copies that spell. Each of those players may choose new targets for their copy.

Flying

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

Enchant creature

Enchanted creature can't attack or block and has ": Hold for Ransom's controller sacrifices it and draws a card. Activate only as a sorcery."

, Exile a card from your hand: Return target card from your graveyard to your hand if it shares a card type with the card exiled this way. (Artifact, battle, creature, enchantment, kindred, instant, land, planeswalker, and sorcery are card types.)

Hexproof

Other permanents you control have hexproof.

At the beginning of combat on your turn, put two +1/+1 counters on each creature you control.

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

Enchant creature

Enchanted creature gets +2/+2 and has protection from creatures.

When Homarid Explorer enters, target player mills four cards.

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

Put a +1/+1 counter on target creature you control. It gains vigilance until end of turn.

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

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.)

Homura, Human Ascendant can't block.

When Homura dies, return it to the battlefield flipped.

When Honey Mammoth enters, you gain 4 life.

: Add one mana of any color.

, : Exile target card from a graveyard.

Delve (Each card you exile from your graveyard while casting this spell pays for .)

Trample

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.

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.

, , 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.

: Add .

Sacrifice Horn of Ramos: Add .

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.

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

Haste (This creature can attack and as soon as it comes under your control.)

Haste

: Another target creature gains haste until end of turn.

Trample

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

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

, : 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.

Target creature gets +X/+0 until end of turn.

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

+1: Put a loyalty counter on Huatli, Radiant Champion for each creature you control.

−1: Target creature gets +X/+X until end of turn, where X is the number of creatures you control.

−8: You get an emblem with "Whenever a creature you control enters, you may draw a card."

Each artifact spell costs more to cast for each artifact its controller controls.

Until end of turn, target creature loses all abilities and has base power and toughness 0/1.

: Draw two cards. Target opponent gains control of Humble Defector. Activate only during your turn.

Destroy target creature with power 4 or greater.

Investigate.(Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Put a +1/+1 counter on a creature you control.

Flying

Whenever you attack with two or more creatures,

Augment (, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)

Flying

Soulshift 4 (When this creature dies, you may return target Spirit card with mana value 4 or less from your graveyard to your hand.)

Hungry Flames deals 3 damage to target creature and 2 damage to target player or planeswalker.

At the beginning of your upkeep, sacrifice Hungry Mist unless you pay .

Choose up to four target creatures you don't control. For each of them, that creature's controller faces a villainous choice — That creature becomes a 1/1 white Human creature and loses all abilities, or you create a token that's a copy of it.

Menace

When Hunted Nightmare enters, target opponent puts a deathtouch counter on a creature they control.

When Hunted Wumpus enters, each other player may put a creature card from their hand onto the battlefield.

This spell costs less to cast if it targets a blue permanent you don't control.

This spell can't be countered.

Target creature you control gets +1/+1 until end of turn. Then it deals damage equal to its power to target creature or planeswalker you don't control.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, other creatures you control get +X/+X until end of turn, where X is the number of times this creature has mutated.

At the beginning of your end step, if you've cast a noncreature spell this turn, reveal the top five cards of your library. For each card type among noncreature spells you've cast this turn, you may put a card of that type from among the revealed cards into your hand. Put the rest on the bottom of your library in a random order.

Kicker (You may pay an additional as you cast this spell.)

Hurloon Battle Hymn deals 4 damage to target creature or planeswalker. If this spell was kicked, you gain 4 life.

When Hurloon Shaman dies, each player sacrifices a land of their choice.

: Hyalopterous Lemure gets -1/-0 and gains flying until end of turn.

Whenever Hydra Omnivore deals combat damage to an opponent, it deals that much damage to each other opponent.