Flying

Whenever Hellkite Whelp attacks, it deals 1 damage to target creature defending player controls.

Trample, haste

At the beginning of the end step, sacrifice Hellspark Elemental.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Spells cost less to cast.

Whenever a player casts a red spell, you may pay . If you do, untap target permanent.

Haste

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.)

: Henchfiend of Ukor gets +1/+0 until end of turn.

: Add .

, : Add one mana of any color.

Devoid (This card has no color.)

Colorless spells you cast cost less to cast.

Flying, vigilance

Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

As Heraldic Banner enters, choose a color.

Creatures you control of the chosen color get +1/+0.

: Add one mana of the chosen color.

Flying

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

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

Tap three untapped Elves you control: Add .

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.

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.

When Hero of the Dunes enters, return target artifact or creature card with mana value 3 or less from your graveyard to the battlefield.

Creatures you control with mana value 3 or less get +1/+0.

Flying

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

When Heroes of the Revel enters, create a 1/1 red Satyr creature token with "This creature can't block."

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

Create two 1/1 white Soldier creature tokens. Until end of turn, creatures you control get +1/+1 and gain haste. (They can attack and this turn.)

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.)

Equipped creature gets +2/+1.

As long as equipped creature is legendary, it has trample and haste.

Equip

Cast this spell only if you've cast another spell this turn.

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

Return all green permanents to their owners' hands.

When an opponent casts an enchantment spell, if Hidden Ancients is an enchantment, Hidden Ancients becomes a 5/5 Treefolk creature.

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 .

Revolt — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, create a 1/1 colorless Servo artifact creature token.

, Sacrifice a creature: Scry 1.

All creatures get -2/-2 until end of turn.

Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Each creature you control assigns combat damage equal to its toughness rather than its power.

Creatures you control can attack as though they didn't have defender.

: Untap target creature.

Each creature you control can block an additional creature each combat.

Until end of turn, whenever a player taps an Island for mana, that player adds an additional .

Highland Weald enters tapped.

: Add or .

Flying, trample

Counter target spell. If that spell is countered this way, put that card on the top or bottom of its owner's library instead of into that player's graveyard.

Prevent all combat damage that would be dealt this turn by creatures with no +1/+1 counters on them.

When Hired Giant enters, each other player may search their library for a land card and put that card onto the battlefield. Then each player who searched their library this way shuffles.

Whenever a creature attacks you, its controller loses 1 life.

Enchant artifact or creature

When Historian's Wisdom enters, if enchanted permanent is a creature with the greatest power among creatures on the battlefield, draw a card.

As long as enchanted permanent is a creature, it gets +2/+1.

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.

When Hoarder's Overflow enters and whenever you expend 4, put a stash counter on it. (You expend 4 as you spend your fourth total mana to cast spells during a turn.)

, Sacrifice Hoarder's Overflow: Discard your hand, then draw cards equal to the number of stash counters on Hoarder's Overflow.

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.

This spell costs less to cast for each creature card in your graveyard.

Flying

When Hollow Marauder enters, any number of target opponents each discard a card. For each of those opponents who didn't discard a card with mana value 4 or greater, draw a card.

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

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

Flying

When Hollowhenge Spirit enters, remove target attacking or blocking creature from combat.

Whenever equipped creature attacks, put a +1/+1 counter on that creature and each other creature you control that shares a creature type with it.

Equip

Enchant creature

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

At the beginning of your end step, if Homicidal Brute didn't attack this turn, tap Homicidal Brute, then transform it.

Homing Lightning deals 4 damage to target creature and each other creature with the same name as that creature.

At the beginning of your upkeep, Honden of Infinite Rage deals damage to any target equal to the number of Shrines you control.

At the beginning of your upkeep, target opponent discards a card for each Shrine you control.