Revolt — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield. Otherwise, you may put it on the bottom of your library.

Flying

When Arcanist's Owl enters the battlefield, look at the top four cards of your library. You may reveal an artifact or enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

When Blanchwood Prowler enters the battlefield, mill three cards. You may put a land card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on Blanchwood Prowler. (To mill a card, put the top card of your library into your graveyard.)

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

When Bloodstoke Howler is turned face up, Beast creatures you control get +3/+0 until end of turn.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Branded Howler.

Enchant creature you control

When Cartouche of Knowledge enters the battlefield, draw a card.

Enchanted creature gets +1/+1 and has flying.

Flash

When Chrome Prowler enters the battlefield, tap target creature an opponent controls.

Whenever an opponent plays a land, put a +1/+1 counter on Dirtcowl Wurm.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

: Dukhara Peafowl gains flying until end of turn.

: Add .

, , Sacrifice a land: Destroy target nonbasic land.

Whenever you cast a green spell, you may create a 2/2 green Wolf creature token.

Whenever you cast a blue spell, you may create a 1/1 blue Bird creature token with flying.

Draw a card for each Island you control, then discard two cards.

Enchant creature

Enchanted creature loses all abilities and is a Bird creature with base power and toughness 1/1.

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

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Gatstaf Howler.

If Goblin Bowling Team would deal damage to a permanent or player, it deals that much damage plus the result of a six-sided die roll to that permanent or player instead.

Target creature gets +X/+0 until end of turn.

Flash

Enchant creature

When Howl of the Hunt enters the battlefield, if enchanted creature is a Wolf or Werewolf, untap that creature.

Enchanted creature gets +2/+2 and has 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.

Howling Gale deals 1 damage to each creature with flying and each player.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Reach (This creature can block creatures with flying.)

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

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

When Howling Wolf enters the battlefield, 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.)

Howlpack Wolf can't block unless you control another Wolf or Werewolf.

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

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

Cumulative upkeep or (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.)

When Jötun Owl Keeper dies, create a 1/1 white Bird creature token with flying for each age counter on it.

: Transform Kessig Prowler.

Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.)

Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles.

Imprint — When Knowledge Pool enters the battlefield, each player exiles the top three cards of their library.

Whenever a player casts a spell from their hand, that player exiles it. If the player does, they may cast a spell from among other cards exiled with Knowledge Pool without paying its mana cost.

Creature spells you cast cost less to cast.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Krallenhorde Howler.

Whenever Lowland Basilisk deals damage to a creature, destroy that creature at end of combat.

: Target Goblin creature you control gets +1/+0 and gains flying until end of turn. Sacrifice that creature at the beginning of the next end step.

Marang River Prowler can't block and can't be blocked.

You may cast Marang River Prowler from your graveyard as long as you control a black or green permanent.

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.)

Nighthowler and enchanted creature each get +X/+X, where X is the number of creature cards in all graveyards.

Flying

When Owl Familiar enters the battlefield, draw a card, then discard a card.

Mama's Coming — Whenever Owlbear Cub attacks a player who controls eight or more lands, look at the top eight cards of your library. You may put a creature card from among them onto the battlefield tapped and attacking that player. Put the rest on the bottom of your library in a random order.

Flying

Ward—Pay 3 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3 life.)

Create a 2/2 green Wolf creature token.

Morbid — Create three 2/2 green Wolf creature tokens instead if a creature died this turn.

Living metal (As long as it's your turn, this Vehicle is also a creature.)

Whenever another creature or Vehicle enters the battlefield under your control, put a +1/+1 counter on Prowl. If this is the second time this ability has resolved this turn, convert Prowl.

Equipped creature can't be blocked except by Walls.

Equip

Vigilance

Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on Prowling Felidar.

Prowling Nightstalker can't be blocked except by black creatures.

This spell can't be countered.

Creature spells you control can't be countered.

Flying

Rimefeather Owl's power and toughness are each equal to the number of snow permanents on the battlefield.

: Put an ice counter on target permanent.

Permanents with ice counters on them are snow.

Draw cards equal to the highest mana value among permanents you control.

Return target sorcery card from your graveyard to your hand.