Yo, J-Money, that's basically the Prophecy mechanic, along with "Unless an opponent pays
".
Yeah I think your version of Study Sesh could work out. I just thought it was flavorful to go for a research / library theme and most research cards involve discarding.
This is one I though up when I was in the subway.
Overdue
Instant
Return target creature or artifact to it's owner's hand.
You may play this spell from your library whenever you search your library, as if it were in your hand.
[This might be a little too rough though, could probably stand to be more expensive or limited in some other way.]
Shunned Sorcerer
Creature - Human Wizard
Intimidate
Contract -
, Discard Shunned Sorcerer from your hand: Destroy target non-artifact Creature.
2/1
Overbearing
Instant
Counter target spell with converted mana cost 4 or less.
Affinity for wizards.
Scholarly Pursuits
Instant
Draw two cards then discard a card from your hand.
[Affinity for wizards creates more tension to play the wizards in your hand instead of channeling them]
Fire Trick
Instant
Fire Trick deals 2 damage to target creature or player.
If you control a wizard Fire Trick does 1 damage to target creature or player.
[Maybe a little OP but you get the idea]
Shuffler Regrowth
Sorcery
Return target card in your graveyard to your hand then shuffle a card from your graveyard into your library.
[Could probably use some work]
New Dual Idea
Land
When New Dual Idea enters the battlefield choose white or blue.
: Add one mana of the chosen colour to your mana pool. (I'm sure we can find a way to track this if absolutely necessary, but that clay construct that has 1 of 3 forms doesn't need no help.)
Eerie Belfry
Land
: Add
to your mana pool.
Contract -
, Discard Eerie Belfry from your hand: Put 2 1/1 white spirit tokens with flying into play.
[There is a lot of tooling we can do with contract lands to give them more tension]
Environmentalist
Creature - Elf Wizard
When Environmentalist enters the battlefield you may return a land card from your graveyard to your hand, if you do put a +1/+1 counter on environmentalist.
2/3
[definitely needs some work]
Sacked Hamlet
Creature - Wall
Defender
When Sacked Hamlet enters the battlefield exile the top card of your library, until the end of turn you may play that card as if it were in your hand.
1/4
[Imagine something like this in other colours with say blue asking your to guess the type and you getting to draw it on a correct guess, green playing a land revealed from top?]
Imagine adding this text to a card you'd already be playing, like a solid creature or a mana rock:
,
, Discard a land card from your hand: Draw a card.
Kamigawa moonfolk fit these themes really well, think meloku.
I'm very curious about more top of library manipulation.
One of my favourite mechanics from salvation read "Whenever this card would become revealed from your hand or library you may play it for this cost"