, : Target creature doesn't untap during its controller's next untap step.

, : Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Flying

Hoverguard Observer can block only creatures with flying.

Flying, vigilance

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.)

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

Whenever Howling Chorus deals combat damage to a player, create a 3/2 colorless Eldrazi Horror creature token.

Reach (This creature can block creatures with flying.)

When Howling Giant enters, create two 2/2 green Wolf creature tokens.

When Howling Wolf enters, you may search your library for up to three cards named Howling Wolf, reveal them, put them into your hand, then shuffle.

Whenever a permanent you control is dealt damage, Howlpack Avenger deals that much damage to any target.

: Howlpack Avenger gets +2/+0 until end of turn.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

This spell can't be countered.

, : You may put a creature card from your hand onto the battlefield. If it's a Wolf or Werewolf, untap Howlpack Piper. Activate only as a sorcery.

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

: Put target creature card from your graveyard on top of your library. Activate only during your turn, before attackers are declared.

When Huatli, Poet of Unity enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.

: Exile Huatli, then return her to the battlefield transformed under her owner's control. Activate only as a sorcery.

Vigilance (Attacking doesn't cause this creature to tap.)

Haste

You may have Hulking Metamorph enter as a copy of an artifact or creature you control, except it's an artifact creature in addition to its other types, and its power and toughness are equal to Hulking Metamorph's power and toughness.

//PRT-Prototype_Mech//

Prototype (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.)

3/3

Ward

At the beginning of your first main phase, add .

Flash

This spell can't be countered.

Whenever you cast a spell, choose up to one —

• Return target spell you don't control to its owner's hand.

• Return target nonland permanent to its owner's hand.

: Draw two cards. Target opponent gains control of Humble Defector. Activate only during your turn.

Constellation — Whenever Humbler of Mortals or another enchantment you control enters, creatures you control gain trample until end of turn.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Vigilance

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

As long as Hundred-Handed One is monstrous, it has reach and can block an additional ninety-nine creatures each combat.

Cycling (, Discard this card: Draw a card.)

As long as you control a green or blue permanent, you may cast Hungering Yeti as though it had flash. (You may cast it any time you could cast an instant.)

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.

As long as you control another Wolf or Werewolf, Hungry Ridgewolf gets +1/+0 and has trample.

Menace

When Hunted Bonebrute enters, target opponent creates two 1/1 white Dog creature tokens.

When Hunted Bonebrute dies, each opponent loses 3 life.

Disguise

Hunted Ghoul can't block Humans.

Flying

When Hunted Lammasu enters, target opponent creates a 4/4 black Horror creature token.

Hunted Phantasm can't be blocked.

When Hunted Phantasm enters, target opponent creates five 1/1 red Goblin creature tokens.

When Hunted Witness dies, create a 1/1 white Soldier creature token with lifelink.

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.

Whenever Hunting Cheetah deals damage to an opponent, you may search your library for a Forest card, reveal that card, put it into your hand, then shuffle.

, : Exile Hunting Kavu and target creature without flying that's attacking you.

First strike

Dinosaur spells you cast have prowl . (You may cast a spell for its prowl cost if you dealt combat damage to a player this turn with a creature with any of its creature types.)

Whenever this creature enters or transforms into Huntmaster of the Fells, create a 2/2 green Wolf creature token and you gain 2 life.

At the beginning of each upkeep, if no spells were cast last turn, transform Huntmaster of the Fells.

, Sacrifice another creature: Hurler Cyclops deals 1 damage to any target.

When Hurloon Shaman dies, each player sacrifices a land.

: Target creature can't be regenerated this turn.

Flash

Flying

Creatures entering don't cause abilities to trigger.

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

Vigilance

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

When Hydra Broodmaster becomes monstrous, create X X/X green Hydra creature tokens.

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.)

Flash

When Hydroelectric Specimen enters, you may change the target of target instant or sorcery spell with a single target to Hydroelectric Specimen.

, Sacrifice Hydromorph Guardian: Counter target spell that targets a creature you control.

: You may tap or untap target artifact an opponent controls.

: Hypnotic Grifter connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Flying

Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.

Flying

When Hypnox enters, if you cast it from your hand, exile all cards from target opponent's hand.

When Hypnox leaves the battlefield, return the exiled cards to their owner's hand.

Trample

Whenever Hystrodon deals combat damage to a player, you may draw 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.)