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Knowledge Pool

Mirrodin Besieged — rare

Artifact

Knowledge Pool rulings:

2011-06-01: You may cast any other card exiled by Knowledge Pool, including one owned by an opponent. Any card exiled by Knowledge Pool’s enters-the-battlefield ability or its other triggered ability may be cast.

2011-06-01: The spell a player casts from their hand won’t resolve if it’s exiled, even if that spell can’t be countered by spells or abilities.

2011-06-01: If the original spell isn’t exiled (perhaps because it’s countered by another spell or ability before Knowledge Pool’s second triggered ability resolves), the rest of the ability does nothing. The player doesn’t get to cast an exiled card.

2011-06-01: If there are no nonland cards exiled by Knowledge Pool, the original spell is still exiled.

2011-06-01: You may pay additional costs, such as kicker costs, of the exiled card.

2011-06-01: If the card has any mandatory additional costs, as Kuldotha Rebirth does, you must pay them in order to cast the spell.

2011-06-01: Timing restrictions based on the card’s type are ignored. For example, you can cast an exiled creature card this way. Other restrictions, such as Spinal Embrace’s “Cast Spinal Embrace only during combat” are not ignored.

2011-06-01: If the card you cast without paying its mana cost has an X in its mana cost, you must choose 0 as its value.

2011-06-01: Any other abilities that trigger when you cast the original spell (for example, if you cast Emrakul, the Aeons Torn) will still trigger and go on the stack.

2011-06-01: If multiple Knowledge Pools are on the battlefield, keep track of which cards are exiled by each of them. Whenever a player casts a spell from their hand: -- If all Knowledge Pools are controlled by the same player, that player chooses the order in which the triggered abilities are put onto the stack. The last one put onto the stack will be the first to resolve. -- If multiple players each control one or more Knowledge Pools, the active player put their triggered abilities on the stack in any order, then each other player in turn order does the same. The last ability put onto the stack this way will be the first to resolve. -- The first triggered ability to resolve will exile the original spell, then the player who cast that spell may cast one of the nonland cards exiled by the Knowledge Pool that generated that triggered ability. The abilities of other Knowledge Pools will do nothing when they resolve, as the original spell will already have been exiled.

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Possibility Storm

Enchantment

Whenever a player casts a spell from their hand, that player exiles it, then exiles cards from the top of their library until they exile a card that shares a card type with it. That player may cast that card without paying its mana cost. Then they put all cards exiled with Possibility Storm on the bottom of their library in a random order.

8.7 /10

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Jeleva, Nephalia's Scourge

Legendary Creature — Vampire Wizard (1/3)

Flying
When Jeleva, Nephalia's Scourge enters the battlefield, each player exiles the top X cards of their library, where X is the amount of mana spent to cast Jeleva.
Whenever Jeleva attacks, you may cast an instant or sorcery spell from among cards exiled with Jeleva without paying its mana cost.

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Ashiok, Nightmare Muse

Legendary Planeswalker — Ashiok

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Invasion of Alara // Awaken the Maelstrom

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When Invasion of Alara enters the battlefield, exile cards from the top of your library until you exile two nonland cards with mana value 4 or less. You may cast one of those two cards without paying its mana cost. Put one of them into your hand. Then put the other cards exiled this way on the bottom of your library in a random order.

Awaken the Maelstrom

Awaken the Maelstrom is all colors.
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Court of Locthwain

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When Court of Locthwain enters the battlefield, you become the monarch.
At the beginning of your upkeep, exile the top card of target opponent's library. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast it. If you're the monarch, until end of turn, you may cast a spell from among cards exiled with Court of Locthwain without paying its mana cost.

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Etali, Primal Conqueror // Etali, Primal Sickness

Legendary Creature — Elder Dinosaur // Legendary Creature — (7/7)

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When Etali, Primal Conqueror enters the battlefield, each player exiles cards from the top of their library until they exile a nonland card. You may cast any number of spells from among the nonland cards exiled this way without paying their mana costs.
: Transform Etali. Activate only as a sorcery.

Etali, Primal Sickness

Trample, indestructible
Whenever Etali, Primal Sickness deals combat damage to a player, they get that many poison counters. (A player with ten or more poison counters loses the game.)

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Kaho, Minamo Historian

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When Kaho, Minamo Historian enters the battlefield, search your library for up to three instant cards, exile them, then shuffle.
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Spellweaver Helix

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Imprint — When Spellweaver Helix enters the battlefield, you may exile two target sorcery cards from a single graveyard.
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Audacious Swap

Instant

Casualty 2 (As you cast this spell, you may sacrifice a creature with power 2 or greater. When you do, copy this spell and you may choose a new target for the copy.)
The owner of target nonenchantment permanent shuffles it into their library, then exiles the top card of their library. If it's a land card, they put it onto the battlefield. Otherwise, they may cast it without paying its mana cost.

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Tibalt's Trickery

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Counter target spell. Choose 1, 2, or 3 at random. Its controller mills that many cards, then exiles cards from the top of their library until they exile a nonland card with a different name than that spell. They may cast that card without paying its mana cost. Then they put the exiled cards on the bottom of their library in a random order.

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River Song's Diary

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Imprint — Whenever a player casts an instant or sorcery spell from their hand, exile it instead of putting it into a graveyard as it resolves.
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Swindler's Scheme

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Synthesis Pod

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( can be paid with either or 2 life.)
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Thought Prison

Artifact

Imprint — When Thought Prison enters the battlefield, you may have target player reveal their hand. If you do, choose a nonland card from it and exile that card.
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Bigger on the Inside

Enchantment — Aura

Enchant artifact or land
Enchanted permanent has ": Target player adds two mana of any one color. The next spell they cast this turn has cascade." (When they cast their next spell, they exile cards from the top of their library until they exile a nonland card that costs less. They may cast it without paying its mana cost. They put the exiled cards on the bottom in a random order.)

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Share the Spoils

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When Share the Spoils enters the battlefield or an opponent loses the game, exile the top card of each player's library.
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Etali's Favor

Enchantment — Aura

Enchant creature you control
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Geological Appraiser

Creature — Human Artificer (3/2)

When Geological Appraiser enters the battlefield, if you cast it, discover 3. (Exile cards from the top of your library until you exile a nonland card with mana value 3 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

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Idol of Endurance

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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.
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Knowledge Pool

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