, Exile Halo Scarab from your graveyard: Create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Room abilities of dungeons you own trigger an additional time.

: Add .

, : Target creature gains haste until end of turn.

, : If you both own and control Hanweir Battlements and a creature named Hanweir Garrison, exile them, then meld them into Hanweir, the Writhing Township.

: Add X mana of any one color, where X is the number of Allies you control.

: 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.)

Vigilance, reach

When Harold and Bob, First Numens dies, if it was a creature, return it to the battlefield. It's an Aura enchantment with enchant Forest you control and "Enchanted Forest has ‘: Add three mana of any one color. You get two rad counters.'" Harold and Bob loses all other abilities.

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.

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

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

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

(: Add or .)

Haunted Mire enters tapped.

: Add or .

, Pay 1 life: Add , , or .

: Put seven +1/+1 counters on Haunted Screen. It becomes a 0/0 Spirit creature in addition to its other types. Activate only once.

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.

: 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.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)

Creatures you control get +1/+0 until end of turn.

Storm (When you cast this spell, copy it for each spell cast before it this turn.)

As an additional cost to cast this spell, exile a creature card from your graveyard.

Headless Skaab enters tapped.

: Add .

, : Add one mana of any color.

, , Tap an untapped Gate you control: Create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

If Heart of Yavimaya would enter, sacrifice a Forest instead. If you do, put Heart of Yavimaya onto the battlefield. If you don't, put it into its owner's graveyard.

: Add .

: Target creature gets +1/+1 until end of turn.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Target opponent discards two cards.

Raid — If you attacked this turn, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I, II — Investigate.

III — Heaven Sent deals 1 damage to each opponent. Then if an opponent has 0 or less life, draw seven cards. Otherwise, exile Heaven Sent and you may cast it this turn.

(: Add or .)

Hedge Maze enters tapped.

When Hedge Maze enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

: Add . ( represents colorless mana.)

Haste

Sarcophagus — You may cast Helbrute from your graveyard by exiling another creature card from your graveyard in addition to paying its other costs.

Flying

, : Add one mana of any color.

: Add .

, : Put a pressure counter on Hellion Crucible.

, , Remove two pressure counters from Hellion Crucible and sacrifice it: Create a 4/4 red Hellion creature token with haste. (It can attack and as soon as it comes under your control.)

: Add .

, : Add one mana of any color.

Circle of Death — : Roll a d20.

1–9 | Each opponent loses 2 life.

10–19 | Each opponent loses 2 life and you gain 2 life.

20 | Each opponent loses 2 life and you gain 2 life. Create two Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Tap three untapped Elves you control: Add .

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

Creatures you control get +2/+1 until end of turn. If this spell was kicked, those creatures also gain trample until end of turn.

Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.)

Hickory Woodlot enters tapped with two depletion counters on it.

, Remove a depletion counter from Hickory Woodlot: Add . If there are no depletion counters on Hickory Woodlot, sacrifice it.

Hidden Courtyard enters tapped.

: Add .

, , Sacrifice Hidden Courtyard: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Revolt — When Hidden Herbalists enters, if a permanent you controlled left the battlefield this turn, add .

Hidden Nursery enters tapped.

: Add .

, , Sacrifice Hidden Nursery: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

All creatures get -2/-2 until end of turn.

Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Frenzied Metabolism — As an additional cost to cast this spell, you may remove any number of +1/+1 counters from among creatures you control. This spell costs less to cast for each counter removed this way.

Vigilance, reach, ward

Titanic — Hierophant Bio-Titan can't be blocked by creatures with power 2 or less.

Each creature you control can block an additional creature each combat.

Until end of turn, whenever a player taps an Island for mana, that player adds an additional .

Highland Lake enters tapped.

: Add or .

When Hinterland Chef enters the battlefield, draft a card from Hinterland Chef's spellbook. It perpetually becomes a Food artifact in addition to its other types and perpetually gains ", , Sacrifice this creature: You gain 3 life."

Hissing Quagmire enters tapped.

: Add or .

: Hissing Quagmire becomes a 2/2 black and green Elemental creature with deathtouch until end of turn. It's still a land.

If you control two or more other lands, Hive of the Eye Tyrant enters tapped.

: Add .

: Until end of turn, Hive of the Eye Tyrant becomes a 3/3 black Beholder creature with menace and "Whenever this creature attacks, exile target card from defending player's graveyard." It's still a land.

Whenever Hoard Robber deals combat damage to a player, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

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."

Hollow Trees enters tapped.

You may choose not to untap Hollow Trees during your untap step.

At the beginning of your upkeep, if Hollow Trees is tapped, put a storage counter on it.

, Remove any number of storage counters from Hollow Trees: Add for each storage counter removed this way.

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.)

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)

As long as Honored Hierarch is renowned, it has vigilance and ": Add one mana of any color."

, Pay 1 life: Add or .

, , Sacrifice Horizon Canopy: Draw a card.

: Add .

Sacrifice Horn of Ramos: Add .

Counter target creature spell. You create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")