Voiceless Incantation
Instant - Metamagic
Target spell you control gains hexproof. At the beginning of your next draw step, draw a card.

Hexproof doesn't work on the stack as-is, so this would require changing the rules, which would make things like Invisible Stalker also be untargetable on the stack.

Voice of Reason
Creature — Human Advisor
When Voice of Reason enters the battlefield, draw a card.
Players can't discard cards. (They can't discard cards to pay costs.)
1/1

Growing Doubt
Enchantment — Aura
Enchant creature
Enchanted creature gets -1/-1.
Whenever enchanted creature's controller discards a card, you may create a token that's a copy of Growing Doubt attached to target creature.

Pack Growth
Sorcery
For each Wolf or Werewolf you control, create a 2/2 green Wolf creature token.
Flashback

Bag of Tricks
Artifact
: Reveal the bottom card of your library. If it's an instant or sorcery with converted mana cost 1, you may cast it without paying its mana cost. Otherwise, put it into your graveyard.

Trick Room
Enchantment
Each player can cast instant spells and spells with flash only any time they could cast a sorcery.
Each player may cast sorcery spells and permanent spells without flash as though they had flash.
Whenever a creature enters the battlefield, tap it if it has haste. Otherwise, it gains haste.
Whenever a creature attacks or blocks, it loses first strike if it has it. Otherwise, it gains first strike.

Danger Room
Battle Enchantment
You may have ~ enter the battlefield as a copy of any Battle on the battlefield, except it has "Creatures attacking this battle can't be blocked."

The Most Dangerous Game
Battle — Siege
If a creature attacking this Battle would deal damage, it deals twice as much damage instead.
If a source would deal damage to a creature attacking this Battle, it deals twice as much damage to that creature instead.
[6]

Garruk's Triumph
Enchantment
Creatures you control have lifelink and ": This creature fights target creature."
Planeswalkers you control have lifelink and ": This planeswalker and target other planeswalker deals damage equal to its loyalty to each other simultaneously."

Garruk of the Wild Hunt
Legendary Creature - Human Warrior (M)
Whenever Garruk of the Wild Hunt enters the battlefield or attacks, create a 2/2 green Wolf creature token.
Whenever a Wolf you control deals combat damage to a player, you may have that creature deal damage equal to its power to target permanent that player controls or protects.
As long as you control four or more Wolves, Garruk has indestructible.
(Desparked watermark)
4/4

The Fair Monarchs' Hunt
Battle Enchantment — Siege Aura
Enchant creature an opponent controls
When The Fair Monarchs' Hunt is defeated, destroy enchanted creature. When that creature dies, if it's Human, exile it.
[3]

Lost Monarch of the Wilds
Creature — Elf Noble
Other non-Human creatures you control have deathtouch.
When Lost Monarch of the Wilds dies, you may return it to the battlefield (face-up) attached to a Human creature an opponent controls.
2/2

The alternative is to make this a new Battle type, Hunt, but I like that this has synergy with Eldraine's artifact/enchantment theme.

Softpaw Wildling
Creature - Beast
Shroud
~ can't be blocked.
1/1

Southpaw Boxer
Creature — Raccoon Warrior
Southpaw Boxer fights with its toughness rather than its power.
1/3

Southern Trade Route
Land
~ enters the battlefield tapped.
Landlink (When ~ enters the battlefield, link it with another target land.)
, : Add one mana of any color that the linked land could produce. Put a Treasure or Food artifact token onto the battlefield under your control.

Reroute the Raiders
Instant
For each creature attacking you or a permanent you control, you may have it attack another player or permanent it could attack.
Cycling
"Strength is only a tool. It is only as useful as the knowledge of how to use it." — Dragonlord Ojutai

Supply Raid
Enchantment
Whenever a creature you control deals combat damage to an opponent, prevent that damage. If you do, put a Treasure or Food artifact token onto the battlefield under your control.

Contested Supply Drop

Battle - Siege
When Contested Supply Drop enters the battlefield, you and the player defending it each create a treasure token.

//
Forward Supply Depot
Land
: If you control no treasures, create two treasure tokens. Otherwise, add

Diamond Droplet
Artifact
: Add one mana of any color among cards in your graveard to your mana pool.

Diamond Golem |
Artifact Creature - Golem (M)
Trample, indestructible
Whenever a source deals damage to ~, that source's controller creates a Treasure token.
5/5