Bloodscent Seeker
Creature - Human Barbarian
First Strike
Whenever a creature an opponent controls is dealt damage, put a +1/+1 counter on Bloodscent Seeker.
2/2


Auriok Arsenal
Artifact - Equipment
Auriok Arsenal can be equipped to any number of creatures at once.
Each creature Auriok Arsenal is equipped to gets +2/+2.
Equip

Unstable Roiltide
Instant
Choose up to two:
-Destroy target tapped creature if was spent to cast Unstable Roiltide.
-Counter target noncreature spell if was spent to cast Unstable Roiltide.
-Target player reveals their hand and you choose a nonland card from it if was spent to cast Unstable Roiltide. That player discards that card.
-Destroy target artifact if was spent to cast Unstable Roiltide.
-Destroy target enchantment if was spent to cast Unstable Roiltide.

Drown in the Fountain
Instant
Draw two cards, then you may discard two cards. When you do, destroy target creature.

Mania
Enchantment - Aura Curse
Enchant player
Creatures enchanted player controls attack each combat if able.
At the beginning of enchanted player's end step, transform Mania.
//
Depression
Enchantment - Aura Curse
Enchant player
Creatures enchanted player controls don't untap during their controller's untap step.
At the beginning of enchanted player's end step, transform Depression.

Deputy of Convictions
Creature - Vedalken Wizard
Flash
When Deputy of Convictions enters the battlefield, each player sacrifices a creature.
"You've had your day in court."
2/1

Medal Ceremony
Instant
Target creature gets +3/+3 until end of turn.
Up to one other target creature gets +2/+2 until end of turn.
Up to one other target creature gets +1/+1 until end of turn.

Ebbing Sanity
Enchantment
Each player's maximum hand size is 0.
"It's only terrifying until you lose the part of yourself that can feel fear."
-Lyzolda, Blood Witch

Possessed Blade
Artifact - Equipment
You control equipped creature. It has haste and attacks each turn if able.
At the beginning of combat on your turn, if Possessed Blade isn't attached to a creature, you may untap target creature and attach Possessed Blade to it.

Original Sin
Enchantment - Aura
Enchant Creature
Enchanted creature gets -2/-1
Whenever a creature enters the battlefield, if Original Sin is in your graveyard, you may pay . If you do, return it to the battlefield attached to that creature.

Suntouched Alseid
Enchantment Creature - Nymph
Creatures you control get +1/+1 for each aura attached to them.
Bestow
1/1

Road Warrior
Creature - Human Warrior
Menace
Whenever a vehicle you control attacks, you may have Road Warrior become attacking. If you do, tap it.
2/2

Thunderdome
Enchantment
When Thunderdome enters the battlefield, you may have target creature you control fight another target creature.
Whenever a creature dies, if it fought a creature you control this turn, you become the monarch.

Fury Road
Enchantment
Vehicles you control have haste.
Whenever a vehicle enters the battlefield under your control, it becomes an artifact creature until end of turn.

Rubick, Grand Magus
Legendary Creature - Human Wizard
Flash
When Rubick, Grand Magus enters the battlefield, copy target spell. You may choose new targets for the copy.
2/2

Goblin Batrider
Creature - Goblin Scout
Flash, Haste
When Goblin Batrider enters the battlefield, target creature you don't control gets -13/-0 until end of turn and blocks another target creature this turn if able.
2/2

Daydream
Instant
Exile target creature until you cast a spell.
Ral got lost in his own thoughts, until Tomik's voice helped him find his way home.

At first I thought Rubick was just a weaker Dualcaster Mage but then I realized it can copy permanent spells as well. I would include the reminder text that permanent spell copies become tokens like seen in new Jin-Gitaxias and others because I think it would generally be included as it's still so niche plus it would help to highlight that this indeed can also copy permanent spells.

Why does Batrider give -13 power instead of setting power to 0? Setting power to zero would be more in-line with white's pie rather than giving -13 power. Haste shouldn't be capitalized there. To what does "another" refer to in its text? To the creature targeted or to Batrider?

I btw commented on Daydream in the CotW thread.

setting power to 0 is more clunky wording-wise. I'd have to to word it as "target creature's base power becomes 0 until end of turn", and it would have weird layers interactions. I think this is the simplest and most intuitive way to get the card to do what I want it to do.

Turn to Shrapnel
Instant
As an additional cost to cast Turn to Shrapnel, sacrifice an artifact.
Turn to Shrapnel deals damage equal to that artifact's mana value to each creature.

Grievous Wounds
Enchantment - Aura
Enchant creature
When Grievous Wounds enters the battlefield, it deals 2 damage to enchanted creature.
Damage isn't removed from enchanted creature as turns end.

Cards from other games

Dragon Dagger
Artifact - Equipment
When Dragon Dagger enters the battlefield, you get :energy::energy:
Equipped creature gets +1/+0
:energy::energy:: Equiped creature gains double strike until end of turn.
Equip

Burst of Silence
Instant
You may only cast Burst of Silence if an opponent cast a spell this turn.
Players can't cast spells this turn. Draw a card.

Daring Gambler
Creature - Human Rogue
When Daring Gambler attacks, you and the defending player each draw a card then discard a card. If you both discarded a land card this way or both discarded a nonland card this way, target creature can't block this turn.
2/1
"You're playing right into my hand."

Goblin Rocket Launcher
Artifact
Goblin Rocket Launcher deals 1 damage to target creature. That creature gains flying until end of turn.

more cards from other games

Lowly Peon
Creature - Human Soldier
If Lowly Peon would deal combat damage to a creature, prevent that damage and Lowly Peon deals that much damage to another creature you don't control.
Whenever Lowly Peon deals combat damage to a player, transform it.
1/1
//
Regal Queen
Creature - Human Noble
If Regal Queen would deal combat damage to a creature, you may prevent that damage. If you do, it deals that much damage to another creature.
2/2

Tile Dealer
Creature - Human Advisor
At the beginning of each player's precombat main phase, that player draws a card then exiles a card from their hand. Each of that player's opponents may play that card until the beginning of their next end step, and they may spend mana as though it were mana of any color to cast it.
2/2

Turf War
Sorcery
Target creature you control fights target creature you don't control. Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Soulbind
Enchantment
When Soulbind enter the battlefield and at the beginning of your upkeep, you may remove all soul counters from creatures. If you do, put a soul counter on two target creatures you don't control.
Creatures with soul counters on them can't attack or block unless each creature with a soul counter on it attacks or blocks this combat.
Whenever you cast a spell that targets a creature with a soul counter on it, you may copy it targeting another creature with a soul counter on it.

Brilliant Medic
Creature - Human Cleric
: Another target creature gains indestructible until end of turn. When a creature dealt damage by that creature this turn dies this turn, transform Brilliant Medic.
1/1
"I knew I had to save him..."
//
Monster Hunter
Creature - Human Cleric
: Destroy target creature that dealt damage to a creature this turn.
3/1
"...but I had no idea who he really was."

Dogged Investigator
Creature - Human Advisor
Adversary (If this creature has no adversary, you may have a creature you don't control become its adversary when either enters the battlefield. It remains this creature's adversary until either leaves the battlefield.)
Whenever Dogged Investigator's adversary attacks or blocks, create a clue token.
Sacrifice three clue tokens: exile target creature paired with Dogged Investigator.
2/2

Sinister Impostor
Creature - Human Rogue
You may have Sinister Impostor enter the battlefield as a copy of any creature, except it has "Whenever this creature blocks or becomes blocked, transform it"
0/0
"That thing, it wore the captain's face..."
//
Deadly Killer
Creature - Human Rogue
Deathtouch
1/4
"...but it was not the captain."

Adversary (If this creature has no adversary, you may have a creature you don't control become its adversary when either enters the battlefield. It remains this creature's adversary until either leaves the battlefield.)

A cycle of uncommons

Undaunted Champion
Creature - Human Knight
Adversary
Prevent all damage that would be dealt to Undaunted Champion by its adversary.
3/3
"I will not allow myself to fall to the likes of you."

Spiteful Schemer
Creature - Human Warlock
Adversary
Whenever Spiteful Schemer is dealt damage, it deals that much damage to its adversary.
1/2
"Never slight a witch. They have short tempers, and long memories."

Relentless Hunter
Creature - Human Warrior
Adversary
Relentless Hunter's adversary blocks it each combat if able.
4/4
"I will track him to the ends of the earth for what he did, and I will make him pay."

Mastermind of Machinations
Creature - Human Advisor
Adversary
Mastermind of Machinations' adversary doesn't untap during its controller's untap step.
3/3
"By the time you've figured out what's happening, it's far too late to stop it."

Defiant Stalwart
Creature - Human Scout
Adversary
Defiant Stalwart's adversary can't block.
3/1
"I'm doing what needs to be done, and I won't let you of all people stop me."