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.

Create a 0/3 blue Crab creature token.

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

: 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.)

Whenever Hardened Escort attacks, another target creature you control gets +1/+0 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Enchant creature

Enchanted creature gets +3/+3.

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."

Target creature you control gains vigilance and gets +X/+X until end of turn, where X is the number of creatures you control.

Prevent all combat damage that would be dealt this turn by attacking creatures.

Put all enchantments on top of their owners' libraries.

All Slivers have "When this permanent enters, destroy target artifact or enchantment."

Enchant land you control

Enchanted land is a 4/5 green Spirit creature with vigilance and haste. It's still a land.

If enchanted land would be destroyed, instead sacrifice Harmonious Emergence and that land gains indestructible until end of turn.

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

Strive — This spell costs more to cast for each target beyond the first.

Gain control of any number of target creatures until end of turn. Untap those creatures. They gain haste until end of turn.

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.)

Vigilance

Whenever Harnessed Snubhorn deals combat damage to a player, return target artifact or enchantment card from your graveyard to the battlefield.

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.

Haste

: Transform Harried Artisan. Activate only as a sorcery. ( can be paid with either or 2 life.)

Haste

When Harried Spearguard dies, create a 1/1 black Rat creature token with "This creature can't block."

As an additional cost to cast this spell, sacrifice a land.

Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

: Look at the top card of your library.

: Reveal the top card of your library. If it's a land card, untap Harsh Deceiver and it gets +1/+1 until end of turn. Activate only once each turn.

Cast this spell only during the declare attackers step and only if you've been attacked this step.

This turn, whenever an attacking creature deals combat damage to you, it deals that much damage to its controller.

Each player chooses a creature type. Destroy all creatures that aren't of a type chosen this way. They can't be regenerated.

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

Rapacious Hunger — Whenever another creature dies, put a +1/+1 counter on Haruspex.

Devouring Monster — , Remove X +1/+1 counters from Haruspex: Add X mana of any one color.

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 you control enters, prevent all damage that would be dealt to target creature this turn.

Trample

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

Coven — At the beginning of combat on your turn, if you control three or more creatures with different powers, Harvesttide Sentry can't be blocked by creatures with power 2 or less this 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.

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

As an additional cost to cast this spell, pay X life.

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

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.)

: Add .

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

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

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

: Add or .

Creatures your opponents control get -1/-0.

As an additional cost to cast this spell, exile X creature cards from your graveyard.

Haunting Misery deals X damage to target player or planeswalker.

Create a 1/1 white Human creature token and a Food token. (Then exile this card. You may cast the creature later from exile.)

: Add .

: Add one mana of any color. Spend this mana only to cast a Dragon creature spell.

, , Sacrifice Haven of the Spirit Dragon: Return target Dragon creature card or Ugin planeswalker card from your graveyard to your hand.

Whenever Havengul Vampire deals combat damage to a player, put a +1/+1 counter on it.

Whenever another creature dies, put a +1/+1 counter on Havengul Vampire.

Flash (You may cast this spell any time you could cast an instant.)

Trample

Flying

When Havoc Eater enters, 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.

Devoid (This card has no color.)

: Havoc Sower gets +2/+1 until end of turn. ( represents colorless mana.)