Enchant creature

Heliod's Punishment enters the battlefield with four task counters on it.

Enchanted creature can't attack or block. It loses all abilities and has ": Remove a task counter from Heliod's Punishment. Then if it has no task counters on it, destroy Heliod's Punishment."

Flying

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Whenever an opponent casts a spell during your turn, draw a card.

At the beginning of each upkeep, if no spells were cast last turn, transform Hermit of the Natterknolls.

Flying

Whenever you cast a spell that targets Hero of the Winds, creatures you control get +1/+0 until end of turn.

Flying

, Exile Heron-Blessed Geist from your graveyard: Create two 1/1 white Spirit creature tokens with flying. Activate only if you control an enchantment and only as a sorcery.

Cast this spell only if you've cast another spell this turn.

Whenever one or more creatures you control become blocked, each blocking creature gets -1/-1 until end of turn.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Whenever you pay Hibernation's End's cumulative upkeep, you may search your library for a creature card with mana value equal to the number of age counters on Hibernation's End, put it onto the battlefield, then shuffle.

Revolt — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, create a 1/1 colorless Servo artifact creature token.

, Sacrifice a creature: Scry 1.

, 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.

When Hierophant's Chalice enters the battlefield, target opponent loses 1 life and you gain 1 life.

: Add .

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.

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

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

Enchant artifact or creature

When Historian's Wisdom enters the battlefield, 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.

Tap target creature. Scry 1.

Draw a card.

Flying

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

Hoisted Hireling has flying as long as it's being held above the battlefield.

Enchant creature or planeswalker

When Hold for Questioning enters the battlefield, 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.

At the beginning of your upkeep, if you have no cards in hand, each opponent loses 2 life.

At the beginning of each opponent's upkeep, if that player has no cards in hand, they lose 2 life.

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 +1/+2.

Homura, Human Ascendant can't block.

When Homura dies, return it to the battlefield flipped.

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

When Honorable Scout enters the battlefield, you gain 2 life for each black and/or red creature target opponent controls.

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

Trample

When Hopeless Nightmare enters the battlefield, 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.

Create three 1/1 red Goblin creature tokens.

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

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

Menace

When Horned Stoneseeker enters the battlefield, create a tapped Powerstone token. (It's an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")

When Horned Stoneseeker leaves the battlefield, sacrifice a Powerstone.

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.)

Whenever you cycle or discard another card, Horror of the Broken Lands gets +2/+1 until end of turn.

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

When Hostile Investigator enters the battlefield, 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.

When Hotshot Investigators enters the battlefield, 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.")

Delirium — Hound of the Farbogs has menace as long as there are four or more card types among cards in your graveyard. (A creature with menace can't be blocked except by two or more creatures.)

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.

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

Vigilance (Attacking doesn't cause this creature to tap.)

Create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life."

Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Equipped creature gets +1/+1.

Equipped creature has deathtouch as long as it's your turn. Otherwise, it has reach.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Threshold — As long as seven or more cards are in your graveyard, Hunting Grounds has "Whenever an opponent casts a spell, you may put a creature card from your hand onto the battlefield."

As long as it's not your turn, this spell costs more to cast.

Return all nonland permanents to their owners' hands. End the turn. (Exile all spells and abilities from the stack, including this card. The player whose turn it is discards down to their maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

Flash

When Hydroelectric Specimen enters the battlefield, you may change the target of target instant or sorcery spell with a single target to Hydroelectric Specimen.

: You may tap or untap target artifact an opponent controls.

Flying

Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.

Whenever you crank Hypnotic Swirly Disc, target player mills X cards, where X is the number of creatures you control.

Science Teacher — Each Saga spell you cast has replicate. The replicate cost is equal to its mana cost. (When you cast that Saga, copy it for each time you paid its replicate cost. Copies of permanents enter the battlefield as tokens.)

Doctor's companion (You can have two commanders if the other is the Doctor.)

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.

Whenever you cast a noncreature spell, put an oil counter on Ichor Synthesizer.

As long as Ichor Synthesizer has four or more oil counters on it, it gets +2/+0 and can't be blocked.