Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

Whenever this creature becomes tapped, you may discard a card. If you do, draw a card.

As Hangman enters, secretly note a word with six to eight letters.

: Target player who doesn't control Hangman guesses the noted word or an unguessed letter in that word. If they guess wrong, put a +1/+1 counter on Hangman. Any player may activate this ability.

When a player guesses the noted word or all of its letters, sacrifice Hangman.

If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.

When Harvester Troll enters, you may sacrifice a creature or land. If you do, put two +1/+1 counters on Harvester Troll.

: 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.

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.

Valiant — Whenever Heartfire Hero becomes the target of a spell or ability you control for the first time each turn, put a +1/+1 counter on it.

When Heartfire Hero dies, it deals damage equal to its power to each opponent.

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

Whenever Heirs of Stromkirk deals combat damage to a player, put a +1/+1 counter on it.

Indestructible

As long as your devotion to white is less than five, Heliod isn't a creature.

Whenever you gain life, put a +1/+1 counter on target creature or enchantment you control.

: Another target creature gains lifelink until end of turn.

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.

Adamant — If at least three mana of the same color was spent to cast this spell, Henge Walker enters with a +1/+1 counter on it.

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.

Creatures you control with +1/+1 counters on them can't be blocked.

Flying

: Put a +1/+1 counter on another target creature with flying.

Whenever one or more +1/+1 counters are put on Herd Baloth, you may create a 4/4 green Beast creature token.

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.

Heroic — Whenever you cast a spell that targets Hero of Leina Tower, you may pay . If you do, put X +1/+1 counters on Hero of Leina Tower.

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.

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.

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.

Reach (This creature can block creatures with flying.)

Fabricate 1 (When this creature enters, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.)

Whenever you attack with one or more Lizards, Hired Claw deals 1 damage to target opponent.

: Put a +1/+1 counter on Hired Claw. Activate only if an opponent lost life this turn and only once each turn.

When Hivespine Wolverine enters, choose one —

• Put a +1/+1 counter on target creature you control.

• Hivespine Wolverine fights target creature token.

• Destroy target artifact or enchantment.

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.)

Homarid enters with a tide counter on it.

At the beginning of your upkeep, put a tide counter on Homarid.

As long as there is exactly one tide counter on Homarid, it gets -1/-1.

As long as there are exactly three tide counters on Homarid, it gets +1/+1.

Whenever there are four or more tide counters on Homarid, remove all tide counters from it.

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."

When Hooded Assassin enters, choose one —

• Put a +1/+1 counter on Hooded Assassin.

• Destroy target creature that was dealt damage this turn.

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

, Remove two +1/+1 counters from among creatures you control: Destroy target artifact or enchantment.

When Hornbash Mentor enters, put a trample counter on target non-Human creature you control.

, : Put a +1/+1 counter on each creature you control with trample.

Double strike

Undying (When this creature 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.)

Creatures with power less than Howlgeist's power can't block it.

Undying (When this creature 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.)

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Put a +1/+1 counter on a creature you control.

Put a +1/+1 counter on target creature.

Morbid — Put three +1/+1 counters on that creature instead if a creature died this turn.

Cats you control have protection from Rats. (They can't be blocked, targeted, or dealt damage by Rats.)

At the beginning of your end step, target opponent creates a 1/1 black Rat creature token with deathtouch.

Whenever a Rat dies, put a +1/+1 counter on each Cat you control.

When Hunter of Eyeblights enters, put a +1/+1 counter on target creature you don't control.

, : Destroy target creature with a counter on it.

This spell costs less to cast if it targets a blue permanent you don't control.

This spell can't be countered.

Target creature you control gets +1/+1 until end of turn. Then it deals damage equal to its power to target creature or planeswalker you don't control.

Create three 1/1 green Elf Warrior creature tokens.

Reinforce 3— (, Discard this card: Put three +1/+1 counters on target creature.)

You may exert Hydra Trainer as it attacks. When you do, target creature gets +X/+X until end of turn, where X is the number of counters on permanents you control. (An exerted creature won't untap during your next untap step.)

: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.)

Enchant creature

When Hydra's Growth enters, put a +1/+1 counter on enchanted creature.

At the beginning of your upkeep, double the number of +1/+1 counters on enchanted creature.

Whenever you tap an untapped creature an opponent controls, you may pay . When you do, choose one —

• Create a 4/4 white and blue Elemental creature token.

• Put a +1/+1 counter on each creature you control.

• Scry 2, then draw a card.

Deathtouch

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

When Hythonia the Cruel becomes monstrous, destroy all non-Gorgon creatures.

At the beginning of your end step, if an artifact or creature was put into a graveyard from the battlefield this turn, put a +1/+1 counter on Ichor Shade.

When Ich-Tekik, Salvage Splicer enters, create a 3/3 colorless Phyrexian Golem artifact creature token.

Whenever an artifact is put into a graveyard from the battlefield, put a +1/+1 counter on Ich-Tekik and a +1/+1 counter on each Golem you control.

Partner (You can have two commanders if both have partner.)

, : 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.

Ignition Team enters with X +1/+1 counters on it, where X is the number of tapped lands on the battlefield.

, Remove a +1/+1 counter from Ignition Team: Target land becomes a 4/4 red Elemental creature until end of turn. It's still a land.

Double strike

Whenever Illuminator Virtuoso becomes the target of a spell you control, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Flying

Whenever Immersturm Predator becomes tapped, exile up to one target card from a graveyard and put a +1/+1 counter on Immersturm Predator.

Sacrifice another creature: Immersturm Predator gains indestructible until end of turn. Tap it.

Flying

Corrupted — Whenever Incisor Glider attacks, if an opponent has three or more poison counters, creatures you control get +1/+1 until end of turn.

Put a +1/+1 counter on target creature, two +1/+1 counters on another target creature, and three +1/+1 counters on a third target creature.