Ghostly Prison

This tax can really be a burden for your opponent, as it can make them choose between trying to race or developing their board. If you’re really far behind it isn’t nearly as useful, but at parity or if you’re ahead it can be nice enough.

Fabricate

Three mana tutors aren’t good in Limited. It’s like adding a tax of 3 mana to whatever your best Artifact is, and it isn’t like this format has a ton of Artifacts anyway.

Show and Tell

This is great in Legacy and Vintage where you can put absurd stuff into play that your opponent has no hope of matching, but in Limited there’s a good chance you lose the game by casting this.

Tragic Slip

This is great in Legacy and Vintage where you can put absurd stuff into play that your opponent has no hope of matching, but in Limited there’s a good chance you lose the game by casting this.

Victimize

If you have some fodder and a well-stocked graveyard, this can give you some pretty awesome value. The set up is real, though.

Gamble

2-for-1ing myself and hoping I don’t discard the thing I tutored is a good way to lose.

Crashing Footfalls

If you suspend this on turn one, there’s a pretty good chance you’re going to win that game. If you get it later in the game it can be pretty brutal though, as it takes forever to actually do its thing

Tireless Tracker

It spits out clues like crazy and grows throughout the game, it's a massive bomb.

Drown in the Loch

This format doesn't have a mill deck, and players can exile cards with one of the main mechanics, so I'm skeptical Drown in the Loch will work out here.

Field of the Dead

Not enough common or uncommon non-basic lands in the format to have any hope of getting this going.

Stoneforge Mystic

There's some legit equipment in this format, and if you've got a couple, the Mystic is worth running.

Brazen Borrower

Desertion

If you counter an artifact or creature spell with this, it feels awesome. If you don't, it's super inefficient.

Morbid Opportunist

Drawing cards with this is exceedingly simple. It counts your creatures or your opponent's, so combat, removal, sacrifice. It all works.

Port Razer

It's hard to take advantage of extra combat steps, and this creature is pretty inefficient.

Scapeshift

This is a combo enabler in 60-card formats. It's a nothing-enabler in 40-card formats.

Mystic Snake

Countering a spell and adding a 2/2 to the board -- all with one card -- is pretty powerful.

Notion Thief

Stealing draws with this is sweet, but it isn't going to happen often enough for this to be the powerhouse it is in other formats.

Desert

This has a useful sub-type in the format, can commit crimes, and the ability is actually pretty nice in general. It'll be worth using in some decks.

Prismatic Vista

This is an evolving wilds that puts the land into play untapped, which is awesome.

Swords to Plowshares

Ledger Shredder

Rat Colony

Relentless Rats

Kindred Charge

Sylvan Tutor

Toski, Bearer of Secrets

Frogmite

Sword of Fire and Ice

Secluded Courtyard

Hallowed Haunting

Soul Warden

Expropriate

Phantasmal Image

Damnation

Sacrifice

Maddening Hex

Unholy Heat

Collected Company

You definitely need to have a lowish curve to take advantage of this, because you need to hit two creatures when you cast it for it to be worth it -- but I think that'll be the case for most decks.

Noxious Revival

Condemn

This is narrow, but efficient enough to be worth it in most White decks -- provided you aren't really aggressive.

Sphinx's Tutelage

This is a legit build around, as blue decks are often capable of drawing lots of cards. But you need a good control deck and lots of card draw to get there.

Grim Tutor

This can grab the best card in your deck, but spending 3 mana and 3 life to grab that card isn't worth it in Limited.

Goblin Bushwhacker

This adds a ton of damage to the board for very little mana.

Embercleave

Casting this usually breaks a game wide open with tons of damage and a creature getting run over, and casting it for 3 or 4 mana is very doable.

Paradise Druid

Hexproof means you're going to get the mana boost almost every time, and producing mana of any color is great.

Bloom Tender

The stat-line's tough, but the mana is nice. You shouldn't really expect more than two mana at a time in Limited, and in the early game it may just be producing Green.

Akroma's Memorial

It's expensive, but as long as you have a few creatures there's a good chance that they are more than threatening enough to turn the game around for you.

Temporal Manipulation

Even spending 5 mana on Time Walk is nuts. Taking an extra turn is one of the strongest things you can do in Magic, so it's well worth it.

Fiend Artisan

This tends to get pretty big, and while the tutor effect isn't always useful, when you have a bomb or utility creature to grab it can be backbreaking.