Haste

When Hellhole Rats enters, target player discards a card. Hellhole Rats deals damage to that player equal to that card's mana value.

Each creature spell you cast with mana value 4 or greater has blitz. The blitz cost is equal to its mana cost. (You may choose to cast that spell for its blitz cost. If you do it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

Blitz costs you pay cost less for each time you've cast your commander from the command zone this game.

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.

Enchant creature

Enchanted creature gets +1/+5.

For Mirrodin (When this Equipment enters, create a 2/2 red Rebel creature token, then attach this to it.)

Equipped creature has flying.

Creatures you control that are equipped get +1/+0.

Equip

When Hexgold Slith enters, you get (two energy counters).

Whenever Hexgold Slith attacks, you may pay . If you do, it gains first strike until end of turn.

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

Hidden Necropolis enters tapped.

: Add .

, , Sacrifice Hidden Necropolis: 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 targeted spells and abilities cost less and have their targets chosen randomly.

You can't spend mana to cast this spell.

Convoke, delve (Each creature you tap while casting this spell pays for or one mana of that creature's color. Each card you exile from your graveyard pays for .)

You may cast Hogaak, Arisen Necropolis from your graveyard.

Trample

Enchant creature or planeswalker

When Hold for Questioning enters, 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.

Creatures you control get +0/+1 for each Gate you control and have vigilance.

: Add . ( represents colorless mana.)

, Tap an untapped creature you control: Add one mana of any color.

Whenever Hollow Dogs attacks, it gets +2/+0 until end of turn.

This spell costs less to cast for each card you've cycled or discarded this turn.

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

Flying

Whenever Hollow Specter deals combat damage to a player, you may pay . If you do, that player reveals X cards from their hand and you choose one of them. That player discards that card.

Hollow Warrior can't attack or block unless you tap an untapped creature you control not declared as an attacking or blocking creature this combat. (This cost is paid as attackers or blockers are declared.)

Sliver creatures you control have ", Discard a card: Draw a card."

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.)

Morbid — When Hollowhenge Scavenger enters, if a creature died this turn, you gain 5 life.

When Hollowhenge Wrangler enters the battlefield, seek a land card.

Discard a land card: Conjure a card named Hollowhenge Beast into your hand. You may also activate this ability while Hollowhenge Wrangler is in your graveyard.

, Exile Holographic Double from your hand: Choose a creature card in your hand. Conjure a duplicate of it into your hand.

Equipped creature has double strike.

Whenever equipped creature deals combat damage, you may put an Aura card from your hand onto the battlefield attached to it.

Equip

Prevent all combat damage that would be dealt this turn.

, : Tap target creature. If that creature is a Zombie, exile it.

Enchant creature

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

Vigilance

If you would gain life, you gain that much life plus 1 instead.

Honor Troll gets +2/+1 as long as you have 25 or more life.

Flying

When Horizon Scholar enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Whenever Howling Golem attacks or blocks, each player draws a card.

Howlpack Wolf can't block unless you control another Wolf or Werewolf.

As long as you control another Wolf or Werewolf, Hungry Ridgewolf gets +1/+0 and has trample.

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

Vigilance

Enchant creature

Enchanted creature has ": This creature deals 1 damage to any target."

: Return Hypervolt Grasp to its owner's hand.

( can be paid with one mana from a snow source.)

Whenever a creature you control enters, if it has one or more oil counters on it, put an oil counter on it.

Creatures you control with oil counters on them get +1/+1.

, : Create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this creature: Add ."

Whenever another Eldrazi you control dies, put a +1/+1 counter on Idol of False Gods.

As long as Idol of False Gods has eight or more +1/+1 counters on it, it's a 0/0 creature in addition to its other types and it has annihilator 2.

Flash

When Idol of the Deep King enters, it deals 2 damage to any target.

Craft with artifact (, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

: Igneous Golem gains trample until end of turn.

Ceremorphosis — When Illithid Harvester enters, turn any number of target tapped nontoken creatures face down. They're 2/2 Horror creatures.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Each other creature you control that's a Wolf or a Werewolf gets +1/+1.

Non-Human Werewolves you control can't transform.

Immolating Gyre deals X damage to each creature and planeswalker you don't control, where X is the number of instant and sorcery cards in your graveyard.

Enchant creature

Enchanted creature gets +2/-2.

Vigilance

Afterlife 1 (When this creature dies, create a 1/1 white and black Spirit creature token with flying.)

: Add .

, , Sacrifice Infernal Idol: You draw two cards and you lose 2 life.

Whenever Infested Werewolf enters or attacks, create two 1/1 green Insect creature tokens.

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

When Inner-Flame Acolyte enters, target creature gets +2/+0 and gains haste until end of turn.

Evoke (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Menace (This creature can't be blocked except by two or more creatures.)

Discard a card, Sacrifice Insolent Neonate: Draw a card.

: Add one mana of any color.

: Exile target card from a graveyard.

You may cast Dinosaur creature spells from among cards you own exiled with Intrepid Paleontologist. If you cast a spell this way, that creature enters with a finality counter on it. (If a creature with a finality counter on it would die, exile it instead.)

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Tolvada enters, return target nonbattle permanent card from your graveyard to the battlefield.

Enchant creature

Prevent all damage that would be dealt to enchanted creature.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")