Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

, Sacrifice Hellhole Flailer: Hellhole Flailer deals damage equal to its power to target player or planeswalker.

Flying, haste

Whenever Hellkite Charger attacks, you may pay . If you do, untap all attacking creatures and after this phase, there is an additional combat phase.

Flying, trample

Whenever Hellkite Tyrant deals combat damage to a player, gain control of all artifacts that player controls.

At the beginning of your upkeep, if you control twenty or more artifacts, you win the game.

, Sacrifice a creature: Return target creature card from your graveyard to the battlefield. Activate only during your upkeep.

Spells cost less to cast.

Equipped creature has first strike, trample, and haste.

: If you control Equipment named Helm of Kaldra, Sword of Kaldra, and Shield of Kaldra, create Kaldra, a legendary 4/4 colorless Avatar creature token. Attach those Equipment to it.

Equip

Return target creature card with mana value 3 or less from your graveyard to the battlefield tapped.

: Hematite Golem gets +2/+0 until end of turn.

When Hemlock Vial enters, you draw a card and you lose 1 life.

, , Sacrifice Hemlock Vial: Each equipped creature and Equipment you control gains deathtouch until end of turn.

: Add .

, : Add one mana of any color.

: Add .

Flying, deathtouch, lifelink

: Each creature you control with flying, deathtouch, and/or lifelink gets +1/+0 until end of turn.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)

Flying

At the beginning of your end step, each opponent discards a card.

, Sacrifice an artifact: Target creature gets -2/-2 until end of turn.

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

Flying

You can't lose the game and your opponents can't win the game.

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.")

Trample

Whenever you cast a creature spell, put two +1/+1 counters on Herald of Ilharg. If that spell has mana value 5 or greater, Herald of Ilharg deals damage equal to the number of counters on it to each opponent.

Flying

Cumulative upkeep—Gain control of a land you don't control. (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.)

Herald of Leshrac gets +1/+1 for each land you control but don't own.

When Herald of Leshrac leaves the battlefield, each player gains control of each land they own that you control.

Flying, vigilance

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

When Herald of the Dreadhorde dies, amass Zombies 2. (Put two +1/+1 counters 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.)

Flying

When Herald of the Forgotten enters, if you cast it, return any number of target permanent cards with cycling abilities from your graveyard to the battlefield.

Enchantment spells you cast cost less to cast.

Whenever you cast an enchantment spell, you gain 1 life.

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Flying

At the beginning of your upkeep, you lose 1 life.

Enchanted creature gets +3/+3 and has flying.

Flying

Whenever Herald of War attacks, put a +1/+1 counter on it.

Angel spells and Human spells you cast cost less to cast for each +1/+1 counter on Herald of War.

As Herald's Horn enters, choose a creature type.

Creature spells you cast of the chosen type cost less to cast.

At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.

, Sacrifice Herbal Poultice: Regenerate target creature.

Whenever another creature you control enters, Herd Gnarr gets +2/+2 until end of turn.

Flying, trample

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

When Herdchaser Dragon is turned face up, put a +1/+1 counter on each other Dragon creature you control.

Tap three untapped Elves you control: Add .

Vigilance

: Hermitic Nautilus gets +3/-3 until end of turn.

Whenever one or more cards are put into exile from your hand or a spell or ability you control exiles one or more permanents from the battlefield, put that many +1/+1 counters on Hero of Bretagard.

As long as Hero of Bretagard has five or more counters on it, it has flying and is an Angel in addition to its other types.

As long as Hero of Bretagard has ten or more counters on it, it has indestructible and is a God in addition to its other types.

Aura spells you cast cost less to cast.

Heroic — Whenever you cast a spell that targets Hero of Iroas, put a +1/+1 counter on Hero of Iroas.

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

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.

Vigilance

Whenever another Human you control enters, put a +1/+1 counter on Heronblade Elite.

: Add X mana of any one color, where X is Heronblade Elite's power.

Equipped creature gets +3/+2.

Whenever a legendary creature you control enters, you may attach Hero's Blade to it.

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

When a player casts a spell, sacrifice Hesitation and counter that spell.

: Remove up to X counters from target permanent. For each counter removed this way, Hex Parasite gets +1/+0 until end of turn. ( can be paid with either or 2 life.)

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.)

Hexgold Slash deals 2 damage to target creature. If that creature has toxic, Hexgold Slash deals 4 damage to that creature instead.

Return all green permanents to their owners' hands.

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.

Flash

When Hidden Blade enters, attach it to target creature you control. If that creature is an Assassin, it gains deathtouch until end of turn.

Equipped creature gets +1/+0 and has first strike.

Equip

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.)

Flash

When Hidden Footblade enters, attach it to target creature you control. That creature gains first strike until end of turn.

Equipped creature gets +1/+0 and has haste.

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

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

When an opponent controls a creature with power 4 or greater, if Hidden Predators is an enchantment, Hidden Predators becomes a 4/4 Beast creature.

Whenever an opponent plays a land, if Hidden Stag is an enchantment, Hidden Stag becomes a 3/2 Elk Beast creature.

Whenever you play a land, if Hidden Stag is a creature, Hidden Stag becomes an enchantment.

Look at the top five cards of your library, cloak two of them, and put the rest on the bottom of your library in a random order. (To cloak a card, put it onto the battlefield face down as a 2/2 creature with ward . Turn it face up any time for its mana cost if it's a creature card.)

Devoid (This card has no color.)

When you cast this spell, for each opponent, gain control of up to one target creature that player controls until end of turn. Untap those creatures. They gain trample, haste, and annihilator 1 until end of turn.

Trample, haste, annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent of their choice.)