Whenever two or more creatures you control attack a player, look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. If you control an Eldrazi, you gain 3 life.

Sacrifice a Swamp: Regenerate target black creature. (The next time that creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

: Horror of the Dim gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

You have ten seconds to look at and rearrange the cards in your library. At the end of those ten seconds, if you're touching one or more of those cards, shuffle.

Double strike

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.)

All creatures lose indestructible until end of turn. Hour of Devastation deals 5 damage to each creature and each non-Bolas planeswalker.

Exile target creature. If that creature was a God, its controller reveals their hand and exiles all cards from it with the same name as that creature.

Search your library for up to two land cards, put them onto the battlefield tapped, then shuffle. Then if you control three or more Deserts, create two 2/2 black Zombie creature tokens.

This spell costs less to cast if there are ten or more nonland permanents on the battlefield.

Destroy all nonland permanents.

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.

Target creature gets +4/+0 until end of turn.

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.

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

Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to target creature an opponent controls.

Destroy target Human creature.

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

Target creature gets +1/+0 until end of turn for each artifact you control.

Create a 3/1 black and red Vampire creature token with trample, lifelink, and haste. Sacrifice it at the beginning of the next end step.

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

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

Choose up to four target creatures you don't control. For each of them, that creature's controller faces a villainous choice — That creature becomes a 1/1 white Human creature and loses all abilities, or you create a token that's a copy of it.

Any number of target players each gain 6 life.

As long as it's not your turn, this spell costs more to cast.

Return all nonland permanents to their owners' hands. End the turn. (Exile all spells and abilities from the stack, including this card. The player whose turn it is discards down to their maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

Target land becomes a 3/3 Elemental creature with flying until end of turn. It's still a land.

, : Tap target creature. This ability costs less to activate during your turn.

, Sacrifice Hylda's Crown of Winter: Draw a card for each tapped creature your opponents control.

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

: Icatian Infantry gains first strike until end of turn.

: Icatian Infantry gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

You may choose not to untap Ice Floe during your untap step.

: Tap target creature without flying that's attacking you. It doesn't untap during its controller's untap step for as long as Ice Floe remains tapped.

Flying

When Icefall Regent enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Icefall Regent.

Spells your opponents cast that target Icefall Regent cost more to cast.

Flying

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 Icefeather Aven is turned face up, you may return another target creature to its owner's hand.

As Icon of Ancestry enters the battlefield, choose a creature type.

Creatures you control of the chosen type get +1/+1.

, : Look at the top three cards of your library. You may reveal a creature card of the chosen type from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

When Idol of Endurance enters the battlefield, exile all creature cards with mana value 3 or less from your graveyard until Idol of Endurance leaves the battlefield.

, : Until end of turn, you may cast a creature spell from among cards exiled with Idol of Endurance without paying its mana cost.

: Draw a card. Activate only if you created a token this turn.

, , Sacrifice Idol of Oblivion: Create a 10/10 colorless Eldrazi creature token.

Vanishing 3

Imprint — When Idris, Soul of the TARDIS enters the battlefield, exile another artifact you control until Idris leaves the battlefield.

Idris has all activated and triggered abilities of the exiled card and gets +X/+X, where X is the exiled card's mana value.

Flying

: Ifh-Bíff Efreet deals 1 damage to each creature with flying and each player. Any player may activate this ability.

Exile the top three cards of your library. Until the end of your next turn, you may play those cards. If this spell was cast from a graveyard, you may play cards this way without paying their mana costs.

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

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flying, trample

Whenever this creature mutates, exile cards from the top of your library until you exile a nonland permanent card. Put that card onto the battlefield or into your hand.

Flying

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.)

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.)

When Illusions of Grandeur enters the battlefield, you gain 20 life.

When Illusions of Grandeur leaves the battlefield, you lose 20 life.

Create three 0/0 white Spirit creature tokens with flying.

Flying

, : Exile the top X cards of your library and put a study counter on each of them. Then you may put a card you own in exile with a study counter on it into your hand.

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.)

Spells you cast with mana value 6 or greater have cascade.

Other Elves you control get +1/+1.

, : Create a 1/1 green Elf Warrior creature token.

, Sacrifice Implement of Examination: Draw a card.

When Implement of Examination is put into a graveyard from the battlefield, draw a card.

, Sacrifice Implement of Improvement: You gain 2 life.

When Implement of Improvement is put into a graveyard from the battlefield, draw a card.

, , Sacrifice Implements of Sacrifice: Add two mana of any one color.

Change the target of target spell with a single target. You lose life equal to that spell's mana value.

At the beginning of your upkeep, you may cast a permanent spell from your hand with mana value equal to 1 plus the highest mana value among other permanents you control without paying its mana cost. If you don't, scry 1.

Reveal the top four cards of your library. You may put a creature card and/or a land card from among them into your hand. Put the rest into your graveyard.