MTG Salvation

Prizes 1B
Sorcery
Search your library for a card that have an Aftermath, put that card into your graveyard, then shuffle.
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Reward 3R
Sorcery
Aftermath (Cast this spell only from your graveyard. Then exile it.)
Until end of turn, you may cast cards that have an Aftermath from your graveyard.
If a card would be put into your graveyard from anywhere this turn, exile that card instead.

Antlion's Sandpit 1G
Enchantment
Whenever one or more creature cards are put into a graveyard from anywhere, exile those card(s). For each card exiled this way that card's owner creates a 2/2 green Insect token with "When this creature dies, it deals 2 damage to you".
When Antlion's Sandpit leaves the battlefield return the exiled cards to their owners’ graveyards, then destroy all Insects.

Trading Mage 2U
Creature - Human Wizard
When Trading Mage enters the battlefield, you may roll a d6. Search your library for an artifact card with mana value X (Or less if you rolled a 1. Or greater if your rolled a 6.), where X is the result , reveal it, put it into your hand, then shuffle.
2/2

Unintelligible Events 3RR
Enchantment
Whenever chaos ensues, Unintelligible Events deals X damage to each player with the greatest number of cards in their hand, where X is the number of cards in their hand. Each player that was not dealt damaged this way exiles their hand and draw X cards.
R: Roll the planar die. Unintelligible Events deals damage to your equal to the number of times you rolled a die this turn. Activate only as a sorcery and only if you haven't rolled Chaos this turn.

Thanks for the comment, I change the text to match your suggestions, glad you like the design.

Bazaar of Irregularities
Land
T: Add C
T: Add a mana of any color. Spend this mana only to cast a creature spell, and when that creature enters the battlefield, suspect it.
At the beginning of your upkeep if you control three or more suspected creatures. Transform Bazaar of Irregularities.
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Underworld Trades
Land
T, Pay 1 life: Add a mana of any color.
At the beginning of your end step, if one or more suspected creatures you control dealt damage to your opponents this turn, for each of those opponents, you may pay 1 life. If you do, draw a card and create a tapped treasure token, then that player investigates.

bolded text correct by user_938036

Manifest Destiny 1B
Enchantment
You cannot cast creatures face-up.
Whenever a nontoken creature you control dies or a creature card is put into your graveyard from anywhere, you may exile it face down instead.
Whenever a permanent you control is turned face up,you may manifest the top card of your library or a card chosen at random from your face down cards in exile.

Form of the Sleepers3WW
Instant
As an additional cost to cast this spell you may exile any number of face-up creatures you control in a face-down pile.
Tap all face-up creatures, put a Stun counter on each creature tapped this way. At the beginning your end step, if you casted this spell during your turn, you may Cloak any number of creatures you own that were exiled face-down this turn.

Shaman of the Unseen Flames 1RR
Creature - Viashino Shaman
Spells you cast face-down cannot be countered.
R, T: Turn target face-down creature you control face-up. It gains haste until the end of turn. Sacrifice it at the beginning of the next end step. Activate only once each turn.
Disguise 2R
3/2

Boon of the Formless 2GG
Enchantment
Face-down creatures you control have vigilance and "T: Add G.".
3G: Manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it’s a creature card.)
Channel — XXGG, Discard Boon of the Formless: Manifest the top X cards of your library.

Ixidor's Golden Chisel 2U
Legendary Artifact
At the beginning of your end step, if you control no face-down creatures. You may exile target face-up creature you control, then cloak it.
T, Tap two untapped face-down creatures you control: Draw a card.
T: Add U. If you spent this mana to pay a mana cost to turn creaturse face up, you may scry 2.(A megamorph cost is a morph cost.)

Sudden Setback says "spell or nonland permament", you may want to check that.

The counter is fine I guess, most of the time it will be a Lapse.

The Lawyer one I like, shame is not an advokist, but its ok.

Tailor of Illusions 1U
Enchantment - Background
Commander creatures you own have: "Whenever a face-down creature enters the battlefield under your control, choose one at random from Noble Role, Citizen Role, Detective Role or Peasant Role and create of those tokens attached to that creature.".


Smoke Suspicions WB
Instant
If an Extort ability from a permanent you control would trigger while you cast this spell, that Extort ability triggers twice.(You still have to pay for each of those instances)
Exile target nonland permanent you don't control if it is suspected, or if you've gained an amount of life greater than its mana value this turn.

Guildpact's Signet 2
Artifact - Clue
1, T, Note a color pair that hasn’t been noted for this artifact: Add two mana in any combination of colors of the last color pair noted for this artifact.
2, Sacrifice Guildpact's Signet: Draw a card.

Ragnus, the Warmonger 2WBR
Legendary Creature - Human Warrior
Whenever a Battle you protect is defeated. You may search your library for a Battle card with equal or lesser mana value, put that card into your hand, then shuffle.
Whenever you defeat a Battle, Ragnus, the Warmonger deals 3 damage to the player that protected it. Each opponent that didn't attacked it discards a card, and you create two tapped Treasure tokens.
3/4

Grudge Match 2BBB
Enchantment
At the beginning of each player's end step, destroy target creature or planeswalker that turn's player controls that dealt damage to you this turn or that targeted a permanent you control with an ability this turn.

Quote from rowanalpha »

It'd be a lot easier to make the enchantment the base mode and have the one shot spell effect be a separate activated ability.

Kindling 3RR
Enchantment
You may cast CARDNAME as though it had flash for R. If you do, sacrifice it when it enters the battlefield.
When CARDNAME enters the battlefield or at the beginning of your upkeep, CARDNAME deals 2 damage to any target.

I feel that can be done even less wordy as a Channel card?

So you are unmileable with this? eh

Withered Leaves G
Instant
Return target permanent card from your graveyard to your hand, if that card's mana value is lower than the greatest mana value among permanents that where put into your graveyard this turn.

Rain of Denial XUU
Instant
This spell cost 2 less to cast if an opponent has drawn two or more cards this turn.
Counter target spell unless its controller pays X. If that player does you may draw X cards and discard X cards.

Quote from ReapThaWhirlwind »

The original cost was 1G, but honestly not sure that it can warrant that cost, as it's hardly worth its place in the deck since it doesn't do anything on its own. That's a troublesome weight to burden. I think a single mana should be fine, but I still do question two mana simply for the last effect, because it holds so much effectiveness.

With That Logic Sneak Attack which is a card that does nothing on its own should cost R, and we know for sure that that is not the case. This are not one shot effects, this are repeateable effects and you can have aviable as soon as turn 1 and that would sit in the table fiving you some kind of advantage that outweights its initial cost for a a long shot.

So you stapled like 3 cards that would work pretty well on their own into a Single Mana enchantment because?

Ohhh Agatha, the Vile Cauldron may have some uses for you, I like you.