Reaper's Thrill
Instant (C)
As an additional cost to cast this spell, sacrifice a creature and discard a card.
Draw three cards.

I'm surprised the intersection between Gravedigger and Raise Dead hasn't found its way into an Evoke card already!

Total Resurrection
Sorcery (R)
Return all creatures from the graveyards onto the battlefield under their owners' control.
The struggle isn't over while even one soul remains in the clutches of Death.

This is one of those designs where the effect exists (All Hallow's Eve, Twilight's Call), but not in the simplest form, which is surprising.

This is mayhaps a bit awkward to cost. It shouldn't cost or else it completely blows out Nausea and Infest out of the water - albeit Infest has a considerable number of strictly better variants these days. There's also desire to add double black to its cost though I think that makes it quite weak considering Black Sun's Zenith. Savage Twister is a peculiar comparison point btw. Both Yahenni's Expertise and Languish clearly indicate that this doesn't really scale in a linear manner when an effect hits for more than -2/-2.

While this isn't particularly mana effective, where it can compensate is in its color intensity. Mana costs with generic mana in addition to are a bit unorthodox - though Ecological Appreciation, Ingenious Mastery, and Orcus, Prince of Undeath are recent cards (historic legal) - plus the cost can be thought to be a Drain Life reference as well Overall making this more splashable is what is going to give an interesting angle to it IMO where as is with cost it would be just a bad Black Sun's Zenith.

Here's a dump of some 17 cards from my Silmarillion fan set I finished some years ago that I think roughly fit into this thread's category. I might have posted some of them elsewhere previously - most certainly actually now that I think about it. One thing to note here is that the renders say "produce mana" instead of "add mana (to your mana pool)" as the set was made prior to the wording update where references to mana pool were removed as "producing mana" was my idea back in the idea to address that particular wording area.

A sort of a black Control Magic variant but not really. It's more like a creature removal that gives you a 1/1 as a bonus.

"Sorcery-speed" lands. The reason this is worded it is because people used to get warnings in tournaments for forgetting to float mana before casting and whatnot. This appeared as a cycle of allied color lands in the set. I recall enemy color variants were to be included in the following sets which I never got into finishing.

Essentially Vendilion Clique effect as a black sorcery. It also keeps the Clique's self-rummaging effect, which is a sort of a bend (albeit that's getting more questionable by the day with the lessons and such), but that's very niche tech with this.

Erm, with this I kinda get why it might not have appeared - it certainly gives black certain type of burn range, especially as a common. Regardless, I think the "you can't die from this" is an interesting clause that I think we are still yet to see in this manner.

Colorshifted Elvish Visionary. There's an existing 1/1 variant - this shifted version prolly hasn't been printed to differentiate between green and blue drawing where this can be arguable be thought of as an efficient creature, which is more in the vain of green.

The main notable thing here with this to its contemporaries is this can enchant any permanent.

A bit peculiar, but stranger green creatures have been printed in green recently afaik. Can also fit at uncommon if you wanna play it safe.

There's nothing notable speaking here mechanically speaking, but I think this would still be the first monoblack Spider unless I've missed one since.

I recall there were few existing cards using this sort of tech, but exploring it has still been quite superficial.

Like a "super sorcery" speed draw card or something. Nifty concept if you ask me, but not too noteworthy.

A bit of a bend for red so maybe not the sort of card to appear in a standard-legal environment but I think this could very well popup in a supplementary modern+ legal product. I did quite bit of exploring with expanding red's capabilities mechanically in the set.

Pretty basic creature stealing effect. Vedalken Shackles is worth bringing up in relation to this card.

One mana rite that also does temporary mana fixing. Temporary mana fixing in red certainly has gotten more visibility over the years - back when I made this it was still a bit more obscure perhaps.

Very by the numbers design, pump effect combined with scaling life gain burst.

Combotastic simple blue effect.

Enchantment version of Darksteel Citadel. Flavor plays a big role here.

A Brainstorm inspired card selection design. This in comparison to Brainstorm is however card disadvantage making it clearly weaker overall - although this also has the possibility of tucking the cards to the bottom which Brainstorm doesn't have.

I haven't specifically checked for this in a while but I think this sort of simple creature effect hasn't still been printed.

Oh yeah, the reason why the render doesn't specifically note about shuffling since my idea for addressing the length of the shuffling clause (the set was made prior to that change as well) was to make it an inherit effect of shuffling. As in like non-rare cards with the space for it that search a library would come with a reminder text of "(Shuffle your library after a player searches it.)" Only 2 or 3 cards would specifically need be errated to function with that change. Namely Signal the Clans and couple of others I can't recall from the top of my head.

Rapidly Reproducing Bear
Creature - Bear (U)
: Create a 2/2 green Bear creature token.
2/2

Final Retribution

Instant (R)

Destroy all attacking or blocking creatures.

Only the dead are safe; only the dead have seen the end of war.
-George Santayana, Soliloquies in England and Later Soliloquies

Edict Of Bolas
Sorcery
Target player sacrifices a creature. If they can't, that player discards a card.

It is indeed quite strange that that does not exist.

Call Chaos
Instant (U)
Cascade.

I am not surprised that red ancestral recall does not exist.

The Lotus Bloom cycle was a mistake.

(though I think a X spell with cascade and nothing else is less interesting than it looks, because most of the time it's going to be worse the higher the value of X which kind of goes against the logic of X spells)

I have somehow forgotten that that cycle was a thing when making it even though I know that's the only reason Cascade decks are played in Modern
I wouldn't necessarily call it a mistake, though maybe the cards needed an overpriced nominal CMC
The card's concept is still cool and it kinda is surprising it doesn't exist unless you know about (and remember) the suspend bombs

Reckless Impulsive Act

Sorcery (U)

Exile the top four cards of your library. Until the end of your next turn, you may play those cards.

"Holy ****"
-Chandra Nalaar

Queen's Guard —
Creature — Human Soldier (U)
As long as you're the monarch, Queen's Guard gets +1/+1 and has vigilance.
“I would glady give my life for the queen, but I'd sooner spill the blood of any who would dare defy her.”
2/1