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."

Put all enchantments on top of their owners' libraries.

Draw three cards.

The next 2 damage that a source of your choice would deal to you and/or permanents you control this turn is dealt to any target instead.

Vigilance

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

, : Harpoon Sniper deals X damage to target attacking or blocking creature, where X is the number of Merfolk you control.

At the beginning of combat on your turn, create a 1/1 colorless Thopter artifact creature token with flying. It gains haste until end of turn. Sacrifice it at the beginning of your next end step.

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.

Target opponent reveals their hand. You choose a creature card from it. That player discards that card. Scry 1.

When Harvest Hand dies, return it to the battlefield transformed under your control.

Whenever Harvestrite Host or another Rabbit you control enters, target creature you control gets +1/+0 until end of turn. Then draw a card if this is the second time this ability has resolved this turn.

, , Put a -1/-1 counter on a creature you control: Hatchet Bully deals 2 damage to any target.

Choose up to two target creatures you don't control. For each of those creatures, create a token that's a copy of that creature. Those tokens gain haste. Exile them at the beginning of the next end step.

Lifelink

Whenever an enchanted creature dies, draw a card for each Aura you controlled that was attached to it.

Equipped creature has vigilance, trample, and haste.

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

When Haunted Dead enters, create a 1/1 white Spirit creature token with flying.

, Discard two cards: Return Haunted Dead from your graveyard to the battlefield 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.

Flying

As Haunting Apparition enters, choose an opponent.

Haunting Apparition's power is equal to 1 plus the number of green creature cards in the chosen player's graveyard.

Whenever an artifact becomes tapped or a player activates an artifact's ability without in its activation cost, Haunting Wind deals 1 damage to that artifact's controller.

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.

Whenever an opponent casts a white spell, they lose 2 life.

Whenever you sacrifice a permanent, Havoc Jester deals 1 damage to any target.

Flying

Shroud (This creature can't be the target of spells or abilities.)

When Haywire Mite dies, you gain 2 life.

, Sacrifice Haywire Mite: Exile target noncreature artifact or noncreature enchantment.

Whenever you attack, target creature you control gets +1/+0 until end of turn. If that creature is a token, it also gains deathtouch until end of turn.

Return up to two target creature cards from your graveyard to your hand. Each opponent loses 2 life and you gain 2 life.

Red creature spells you cast cost less to cast.

Whenever you cast a creature spell, you may discard a card. If you do, draw a card.

Whenever Headhunter deals combat damage to a player, that player discards a card.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Flying, lifelink

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.

This spell costs less to cast, where X is the number of cards in your graveyard that are instant cards, sorcery cards, and/or have an Adventure.

Double strike

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.")

Activated abilities of creatures cost less to activate. This effect can't reduce the mana in that cost to less than one mana.

, or , : Target creature gains trample until end of turn.

Whenever a creature blocks, Heat of Battle deals 1 damage to that creature's controller.

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.)

Blue creatures can't block creatures you control.

Nonblue creatures can't block creatures you control unless their controller pays 1 life for each blocking creature they control.

Equipped creature doesn't untap during its controller's untap step.

Equipped creature has ": This creature deals 2 damage to any target."

Equip

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

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

: Target creature attacks this turn if able.

You may choose not to untap Hedge Whisperer during your untap step.

, , Collect evidence 4: Target land you control becomes a 5/5 green Plant Boar creature with haste for as long as Hedge Whisperer remains tapped. It's still a land. Activate only as a sorcery. (To collect evidence 4, exile cards with total mana value 4 or greater from your graveyard.)

Landfall — Whenever a land you control enters, target player mills three cards.

Trample

Heedless One's power and toughness are each equal to the number of Elves on the battlefield.

Discard a card: Transform Heir of Falkenrath. Activate only once each turn.

Flying

, : Draw a card. For each mana in this ability's activation cost, you may tap an untapped creature you control rather than pay that mana. Activate only as a sorcery.

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.)

Whenever Heliod's Emissary or enchanted creature attacks, tap target creature an opponent controls.

Enchanted creature gets +3/+3.

At the beginning of each opponent's upkeep, if that player has two or fewer cards in hand, Hellfire Mongrel deals 2 damage to that player.

Haste

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

Flying

: Hellkite Punisher gets +1/+0 until end of turn.