Shocked Senseless
Sorcery (U)
Shocked Senseless deals 3 damage to target player. That player can't draw cards on their next turn.

That feels too cheap to block a card draw, but I'm not sure.

Shocking Revelation
Instant (R)
Cloak a card from your hand. It gains "When this creature is turned face up, it deals damage equal to its power to any target."
"You fools!"

It should probably cost .

Revel in Slaughter
Sorcery (M)
Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase. Creatures you control get +X/+0 until end of turn.

Does that count? Revel from revelation? Probably not.

Revelation in Slaughter
Sorcery (M)
Revelation in Flame deals X damage to each creature, then each player discards their hand and draws equal to the highest mana value among creatures dealt lethal damage in this way.

Lamb
Instant
Create a 0/1 white Sheep creature token.
--/TO (Aftermath)/--
Slaughter
Sorcery
Destroy all creatures.
Aftermath

... One moment I thought this was Let's Make the Card Fun thread

Badger Umbra
Enchantment - Aura (C)
Enchant creature you control.
When ~ enchants a creature, that creature fights target creature you don't control.
Totem Armor

Might be too good for common.

FYI, totem armor was changed to umbra armor. I don't think the card is too good. Bite spells can cost one mana now (Hard Hitting Question, which granted, is an uncommon) or two mana with a bonus (Throw from the Saddle, a common), and this is only a little better.

Living Amnesty
Enchantment Creature — Avatar (U)
Bestow
Living Amnesty enters with a shield counter.
Umbra armor
2/2

Gaian, Maro-Sorcerer
Legendary Creature — Elemental (R)
When Gaian enters the battlefield, search your library for up to three basic lands, reveal them and put them into your hand. Then shuffle.
Gaian’s power and toughness are each equal to the number of cards in your hand.
Landfall — draw a card.
*/*

Natures Dominion
Enchantment (M)
At the beginning of each upkeep, untap all lands you control.
Whenever you tap a land for mana, add one mana of any type that land produced.
: Create an 8/8 green elemental creature token with trample.

Steeldriver
Creature — Human Peasant (C)
When Steeldriver enters, put a +1/+1 counter on target creature or artifact. If that permanent is a noncreature Vehicle, it becomes an artifact creature until end of turn. If that permanent is a Mount, it becomes saddled until end of turn.
1/1

Haunted Bayou
Enchantment ─ Aura (U)
You may tap an untapped creature with menace you control rather than pay this spells mana cost.
Enchant land
Enchanted land gains ": Add ."

Gloating Monologist
Creature — Human Warlock (R)
Prowess, deathtouch
Whenever you cast a plotted spell, reveal cards from the top of your library until you reveal a nonland card with mana value equal to that spell's mana value plus one. Exile that card and put the rest of the cards on the bottom of your library in random order. The exiled card becomes plotted. This ability triggers only once per turn.
0/4

Unnatural Evolution
Sorcery (M)
Put X +1/+1 counters on target creature, then draw cards equal to the number of +1/+1 counters on it.
Sometimes we learn more from the aberations than the stock.

Fetid Growth
Instant (C)
As an additional cost to cast Fetid Growth, exile a land card from target players graveyard.
Draw 2 cards.

Infuse with Aggression
Instant (U)
Target creature gets +3/+3 and gains menace until end of turn.
Recycle - Whenever Infuse with Aggression is exiled from a graveyard, add .

Should be hybrid, but I think that could be.

Mycomime
Sorcery (R)
Exile target creature card from a graveyard. Create a token that's a copy of that creature except it's a 0/0 black and green Fungus and it has "At the beginning of your upkeep, put a +1/+1 counter on this creature." Put a +1/+1 counter on that creature.

Dark Choices
Sorcery (M)
Destroy a target creature of each unique mana value among creatures on the battlefield. If a creature is tied, you choose.

Prophetic Shard (C)

Artifact
When Prophetic Shard enters the battlefield, scry 1.
, : Add one mana of any color.

Academic Counseling
Sorcery — Lesson (U)
Choose target creature you control. Look at the top two cards on your library. Exile up to one instant or sorcery card from among those cards and put the rest in your graveyard. Put a +1/+1 card on that creature for each card you put in your graveyard this way. That creature gains ": You may cast the exiled card."

Coin of the Blackened Denarius
Legndary Artifact (R)
: Gain control of target creature with power 0.

Shattered Moon Prison
Legendary Artifact (M)
, Exile the top card on your library: Add .
: Reveal all face-down cards exiled with Shattered Moon Prison. If there are four or more card types among the exiled cards, you may sacrifice Shattered Moon Prison. If you do, choose one of the nonland cards among them and cast it without paying its mana cost. Either way, put the rest of the cards in your graveyard.

Roadside Inn
Land (C)
When Roadside Inn enters, you may tap an untapped creature you control. If you do, you gain 3 life.
: Add .
Just as it feels like your frozen feet could not take another step, you come across a cozy tavern with the windows casting warm light out into the cold.