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Knowledge Exploitation

Morningtide — rare

Tribal Sorcery — Rogue

Knowledge Exploitation rulings:

2008-04-01: You cast the instant or sorcery card as part of the resolution of this spell. It’s cast from your opponent’s library, not your hand. You choose modes, pay additional costs, choose targets, etc. for the spell as normal when casting it. Any X in the mana cost will be 0. Alternative costs can’t be paid.

2008-04-01: If you can’t find an instant or sorcery card that can be legally cast, or choose not to find one, skip that part of the effect. Then the opponent shuffles their library.

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7.06/10

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Kasmina, Enigma Sage

Legendary Planeswalker — Kasmina

Each other planeswalker you control has the loyalty abilities of Kasmina, Enigma Sage.
+2: Scry 1.
?X: Create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it.
?8: Search your library for an instant or sorcery card that shares a color with this planeswalker, exile that card, then shuffle. You may cast that card without paying its mana cost.

7.5 /10

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Bring to Light

Sorcery

Converge — Search your library for a creature, instant, or sorcery card with mana value less than or equal to the number of colors of mana spent to cast this spell, exile that card, then shuffle. You may cast that card without paying its mana cost.

8.8 /10

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Chaos Wand

Artifact

, : Target opponent exiles cards from the top of their library until they exile an instant or sorcery card. You may cast that card without paying its mana cost. Then put the exiled cards that weren't cast this way on the bottom of that library in a random order.

9.2 /10

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Dazzling Sphinx

Creature — Sphinx (4/5)

Flying
Whenever Dazzling Sphinx deals combat damage to a player, that player exiles cards from the top of their library until they exile an instant or sorcery card. You may cast that card without paying its mana cost. Then that player puts the exiled cards that weren't cast this way on the bottom of their library in a random order.

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Gríma, Saruman's Footman

Legendary Creature — Human Advisor (1/4)

Gríma, Saruman's Footman can't be blocked.
Whenever Gríma deals combat damage to a player, that player exiles cards from the top of their library until they exile an instant or sorcery card. You may cast that card without paying its mana cost. Then that player puts the exiled cards that weren't cast this way on the bottom of their library in a random order.

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Ore-Rich Stalactite // Cosmium Catalyst

Artifact // Artifact

: Add . Spend this mana only to cast an instant or sorcery spell.
Craft with four or more red instant and/or sorcery cards (, Exile this artifact, Exile the four or more from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

Cosmium Catalyst

, : Choose an exiled card used to craft Cosmium Catalyst at random. You may cast that card without paying its mana cost.

4.9 /10

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Codie, Vociferous Codex

Legendary Artifact Creature — Construct (1/4)

You can't cast permanent spells.
, : Add . When you cast your next spell this turn, exile cards from the top of your library until you exile an instant or sorcery card with lesser mana value. Until end of turn, you may cast that card without paying its mana cost. Put each other card exiled this way on the bottom of your library in a random order.

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Ensnared by the Mara

Sorcery

Each opponent faces a villainous choice — They exile cards from the top of their library until they exile a nonland card, then you may cast that card without paying its mana cost, or that player exiles the top four cards of their library and Ensnared by the Mara deals damage equal to the total mana value of those exiled cards to that player.

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Kheru Spellsnatcher

Creature — Naga Wizard (3/3)

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 Kheru Spellsnatcher is turned face up, counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may cast that card without paying its mana cost for as long as it remains exiled.

7.5 /10

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Inevitable Betrayal

Sorcery

Suspend 3— (Rather than cast this card from your hand, pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)
Search target opponent's library for a creature card and put that card onto the battlefield under your control. Then that player shuffles.

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Neera, Wild Mage

Legendary Creature — Human Elf Shaman (2/7)

Whenever you cast a spell, you may put it on the bottom of its owner's library. If you do, reveal cards from the top of your library until you reveal a nonland card. You may cast that card without paying its mana cost. Then put all revealed cards not cast this way on the bottom of your library in a random order. This ability triggers only once each turn.

7.9 /10

Nicol Bolas, God-Pharaoh

Legendary Planeswalker — Bolas

+2: Target opponent exiles cards from the top of their library until they exile a nonland card. Until end of turn, you may cast that card without paying its mana cost.
+1: Each opponent exiles two cards from their hand.
?4: Nicol Bolas, God-Pharaoh deals 7 damage to target opponent, creature an opponent controls, or planeswalker an opponent controls.
?12: Exile each nonland permanent your opponents control.

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Plargg, Dean of Chaos // Augusta, Dean of Order

Legendary Creature — Orc Shaman // Legendary Creature — Huma (2/2)

, Discard a card: Draw a card.
, : Reveal cards from the top of your library until you reveal a nonlegendary, nonland card with mana value 3 or less. You may cast that card without paying its mana cost. Put all revealed cards not cast this way on the bottom of your library in a random order.

Augusta, Dean of Order

Other tapped creatures you control get +1/+0.
Other untapped creatures you control get +0/+1.
Whenever you attack, untap each creature you control, then tap any number of creatures you control.

7.3 /10

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Stolen Goods

Sorcery

Target opponent exiles cards from the top of their library until they exile a nonland card. Until end of turn, you may cast that card without paying its mana cost.

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Unpredictable Cyclone

Enchantment

If a cycling ability of another nonland card would cause you to draw a card, instead exile cards from the top of your library until you exile a card that shares a card type with the cycled card. You may cast that card without paying its mana cost. Then put the exiled cards that weren't cast this way on the bottom of your library in a random order.
Cycling (, Discard this card: Draw a card.)

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Jodah, the Unifier

Legendary Creature — Human Wizard (5/5)

Legendary creatures you control get +X/+X, where X is the number of legendary creatures you control.
Whenever you cast a legendary spell from your hand, exile cards from the top of your library until you exile a legendary nonland card with lesser mana value. You may cast that card without paying its mana cost. Put the rest on the bottom of your library in a random order.

9.2 /10

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Sarevok's Tome

Artifact

When Sarevok's Tome enters the battlefield, you take the initiative.
: Add . If you have the initiative, add instead.
, : Exile cards from the top of your library until you exile a nonland card. You may cast that card without paying its mana cost. Activate only if you've completed a dungeon.

8.5 /10

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Treasure Keeper

Artifact Creature — Construct (3/3)

When Treasure Keeper dies, reveal cards from the top of your library until you reveal a nonland card with mana value 3 or less. You may cast that card without paying its mana cost. Put all revealed cards not cast this way on the bottom of your library in a random order.

7.5 /10

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Earwig Squad

Creature — Goblin Rogue (5/3)

Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.)
When Earwig Squad enters the battlefield, if its prowl cost was paid, search target opponent's library for three cards and exile them. Then that player shuffles.

5 /10

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Spellshift

Instant

Counter target instant or sorcery spell. Its controller reveals cards from the top of their library until they reveal an instant or sorcery card. That player may cast that card without paying its mana cost. Then the player shuffles.

1.5 /10

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Knowledge Exploitation

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