You may cast Harbinger of the Tides as though it had flash if you pay more to cast it. (You may cast it any time you could cast an instant.)

When Harbinger of the Tides enters the battlefield, you may return target tapped creature an opponent controls to its owner's hand.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Harbor Serpent can't attack unless there are five or more Islands on the battlefield.

: Add one mana of any color.

Whenever you commit a crime, untap Hardbristle Bandit. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Commander creatures you own have "Whenever this creature attacks a player, if no opponent has more life than that player, another target creature you control gets +X/+X until end of turn, where X is this creature's power."

Flying

: Target creature gains flying until end of turn.

Tap any number of untapped creatures you control. You gain 4 life for each creature tapped this way.

Whenever you cast an instant or sorcery spell from your hand, you may cast target card with the same name as that spell from your graveyard. (You still pay its costs.)

Discard a card: Exile the top two cards of your library. You may play those cards this turn.

Flying

Whenever Harper Recruiter attacks, look at the top four cards of your library. You may reveal a Cleric card, a Rogue card, a Warrior card, and/or a Wizard card from among them and put those cards into your hand. Put the rest on the bottom of your library in a random order.

At the beginning of combat on your turn, create a 1/1 colorless Thopter artifact creature token with flying. It gains haste until end of turn. Sacrifice it at the beginning of your next end step.

As Harsh Judgment enters the battlefield, choose a color.

If an instant or sorcery spell of the chosen color would deal damage to you, it deals that damage to its controller instead.

Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, Harsh Mentor deals 2 damage to that player.

Harsh Sustenance deals X damage to any target and you gain X life, where X is the number of creatures you control.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

, , Discard a card: Until end of turn, if you tap a land for mana, it produces one mana of a color of your choice instead of any other type and amount.

Search your library for up to X basic land cards, where X is the number of tapped creatures you control, put those cards onto the battlefield tapped, then shuffle.

: Add one mana of any color that a land you control could produce.

Deathtouch

Whenever another nontoken creature dies, you may draw a card.

Constellation — Whenever Harvestguard Alseids or another enchantment enters the battlefield under your control, prevent all damage that would be dealt to target creature this turn.

Trample

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

Target blocking or blocked creature you control gets +1/+1 and gains first strike until end of turn. If it has a hat, it gains double strike until end of turn. If you and that creature each have a hat, the creature gains triple strike until end of turn.

Reach

Undergrowth — When you cast this spell, reveal the top X cards of your library, where X is the number of creature cards in your graveyard. You may put a green permanent card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.

When Hatching Plans is put into a graveyard from the battlefield, draw three cards.

: Target blue or red creature gets +1/+0 until end of turn.

Lifelink

Whenever an enchanted creature dies, draw a card for each Aura you controlled that was attached to it.

Flying

Haughty Djinn's power is equal to the number of instant and sorcery cards in your graveyard.

Instant and sorcery spells you cast cost less to cast.

When Haunt of the Dead Marshes enters the battlefield, scry 1.

: Return Haunt of the Dead Marshes from your graveyard to the battlefield tapped. Activate only if you control a legendary creature.

Whenever Haunted Cadaver deals combat damage to a player, you may sacrifice it. If you do, that player discards three cards.

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

: Put target creature card from your graveyard on top of your library.

: Add .

, , Sacrifice Haunted Fengraf: Return a creature card at random from your graveyard to your hand.

Visit — Return target creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of your next end step.

Lights — 3, 6

Whenever a creature an opponent controls dies, you may pay . If you do, create a 1/1 white Spirit creature token with flying.

Commander creatures you own have "Whenever this creature becomes tapped, it and other creatures you control that share a creature type with it each get +2/+0 and gain undying until end of turn." (When a creature with undying 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.)

Haunted Ridge enters the battlefield tapped unless you control two or more other lands.

: Add or .

Flying

As Haunting Apparition enters the battlefield, choose an opponent.

Haunting Apparition's power is equal to 1 plus the number of green creature cards in the chosen player's graveyard.

Vigilance

Haunting Figment can't be blocked as long as you've cast an instant or sorcery spell this turn.

Each player reveals the top card of their library. For each creature card revealed this way, create a token that's a copy of that card, except it's 1/1, it's a Spirit in addition to its other types, and it has flying. If no creature cards were revealed this way, return Haunting Imitation to its owner's hand.

Choose a creature type. Return up to two creature cards of that type from your graveyard to the battlefield. If this spell was foretold, return all creature cards of that type from your graveyard to the battlefield instead.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Haven of the Harvest enters the battlefield tapped.

: Add or .

Havenwood Battleground enters the battlefield tapped.

: Add .

, Sacrifice Havenwood Battleground: Add .

Flying

When Havoc Eater enters the battlefield, for each opponent, goad up to one target creature that opponent controls. Put X +1/+1 counters on Havoc Eater, where X is the total power of creatures goaded this way.

Whenever you sacrifice a permanent, Havoc Jester deals 1 damage to any target.

, : Target creature you control phases out. (Treat it and anything attached to it as though they don't exist until your next turn.)

When Haywire Mite dies, you gain 2 life.

, Sacrifice Haywire Mite: Exile target noncreature artifact or noncreature enchantment.

Creatures with no counters on them get -2/-2 until end of turn.

When Hazezon Tamar enters the battlefield, create X 1/1 Sand Warrior creature tokens that are red, green, and white at the beginning of your next upkeep, where X is the number of lands you control at that time.

When Hazezon leaves the battlefield, exile all Sand Warriors.

Indestructible, haste

Hazoret the Fervent can't attack or block unless you have one or fewer cards in hand.

, Discard a card: Hazoret deals 2 damage to each opponent.

Red creature spells you cast cost less to cast.

Whenever you cast a creature spell, you may discard a card. If you do, draw a card.

You and target opponent play Seven Questions with the top card of that player's library. If you win, prevent all damage that would be dealt this turn by a source of your choice. (To play Seven Questions, that player looks at the card, then you ask up to six yes-or-no questions about the card that they answer truthfully. You guess the card's name—that's question seven—then the player reveals the card.)

Flying

Hellbent — Whenever Headless Specter deals combat damage to a player, if you have no cards in hand, that player discards a card at random.