Whenever Hans Eriksson attacks, reveal the top card of your library. If it's a creature card, put it onto the battlefield tapped and attacking defending player or a planeswalker they control. Otherwise, put that card into your hand. When you put a creature card onto the battlefield this way, it fights Hans Eriksson.

Whenever Hanweir Garrison attacks, create two 1/1 red Human creature tokens that are tapped and attacking.

(Melds with Hanweir Battlements.)

Whenever Hapatra, Vizier of Poisons deals combat damage to a player, you may put a -1/-1 counter on target creature.

Whenever you put one or more -1/-1 counters on a creature, create a 1/1 green Snake creature token with deathtouch.

Sacrifice Hapless Researcher: Draw a card, then discard a card.

Reach

At the beginning of combat on your turn, another target creature you control gets +1/+0 until end of turn.

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

When Harald, King of Skemfar enters, look at the top five cards of your library. You may reveal an Elf, Warrior, or Tyvar card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Nonbasic lands are Islands.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Harbor Serpent can't attack unless there are five or more Islands on the battlefield.

Whenever Hardened Berserker attacks, the next spell you cast this turn costs less to cast.

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.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control.

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

All Slivers have "When this permanent enters, destroy target artifact or enchantment."

Enchant land you control

Enchanted land is a 4/5 green Spirit creature with vigilance and haste. It's still a land.

If enchanted land would be destroyed, instead sacrifice Harmonious Emergence and that land gains indestructible until end of turn.

Strive — This spell costs more to cast for each target beyond the first.

Gain control of any number of target creatures until end of turn. Untap those creatures. They gain haste until end of turn.

Whenever you cast an instant or sorcery spell from your hand, you may cast target card with the same name as that spell from your graveyard. (You still pay its costs.)

Vigilance

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

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.

Haste

: Transform Harried Artisan. Activate only as a sorcery. ( can be paid with either or 2 life.)

Haste

When Harried Spearguard dies, create a 1/1 black Rat creature token with "This creature can't block."

: Look at the top card of your library.

: Reveal the top card of your library. If it's a land card, untap Harsh Deceiver and it gets +1/+1 until end of turn. Activate only once each turn.

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

This turn, whenever an attacking creature deals combat damage to you, it deals that much damage to its controller.

Each player chooses a creature type. Destroy all creatures that aren't of a type chosen this way. They can't be regenerated.

Harsh Sustenance deals X damage to any target and you gain X life, where X is the number of creatures you control.

Target opponent discards two cards. (Then exile this card. You may cast the creature later from exile.)

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

As an additional cost to cast this spell, exile X cards from your graveyard.

Harvest Pyre deals X damage to target creature.

When Harvest Wurm enters, sacrifice it unless you return a basic land card from your graveyard to your hand.

Menace

When Harvester of Misery enters, other creatures get -2/-2 until end of turn.

, Discard Harvester of Misery: Target creature gets -2/-2 until end of turn.

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

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.

Trample

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

: Add .

, Pay 1 life: Add .

, , Sacrifice a Desert: Target creature gets +3/+3 until end of turn. Activate only as a sorcery.

Replicate (When you cast this spell, copy it for each time you paid its replicate cost.)

Each Sliver spell you cast has replicate. The replicate cost is equal to its mana cost. (A copy of a permanent spell becomes a token.)

When Hatching Plans is put into a graveyard from the battlefield, draw three cards.

When Haunt of the Dead Marshes enters, scry 1.

: Return Haunt of the Dead Marshes from your graveyard to the battlefield tapped. Activate only if you control a legendary creature.

Visit — Return target creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of your next end step.

Lights — 3, 6

: 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.

Create a 1/1 white Human creature token and a Food token. (Then exile this card. You may cast the creature later from exile.)

: 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.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

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

, : Target creature you control phases out. (Treat it and anything attached to it as though they don't exist until your next turn.)

Creatures with no counters on them get -2/-2 until end of turn.

Menace

Whenever Hazel's Brewmaster enters or attacks, exile up to one target card from a graveyard and create a Food token.

Foods you control have all activated abilities of all creature cards exiled with Hazel's Brewmaster.

Desertwalk (This creature can't be blocked as long as defending player controls a Desert.)

You may play Desert lands from your graveyard.

Whenever a Desert you control enters, create two 1/1 red, green, and white Sand Warrior creature tokens.

At the beginning of combat on your turn, you may have target creature you control get +2/+0 and gain haste until end of turn. If you do, sacrifice it at the beginning of the next end step.

Shuffle your library, then exile the top four cards. You may cast any number of spells with mana value 5 or less from among them without paying their mana costs. Lands you control don't untap during your next untap step.

Flying

, Sacrifice a Spirit: Target opponent reveals their hand. You choose a card from it. That player discards that card. Activate only as a sorcery.

Soulshift 4 (When this creature dies, you may return target Spirit card with mana value 4 or less from your graveyard to your hand.)