Lakeside Inn
Land (U)
When Lakeside Inn enters, you may tap an untapped creature you control. If you do, draw a card.
: Add .
Fish by day, gossip by night.

Innside Road
Land {R}
You may have Innside Road enter the battlefield tapped.
Whenever a land enters the battlefield tapped under your control, you gain 3 life.
: Add .

I'm not sure if you gain 3 life even if you choose to have it come into play tapped, but please pretend that it works

Ringside Seats
Land (M)
Whenever a creature fights, put a contender counter on Ringside Seats.
: Add .
, remove X contender counters from Ringside Seats: Put a creature card with mana value X from your hand onto the battlefield.

Civilize
Sorcery (C)
Spree
+ — You and target opponent each draw a card and gain 3 life.
+ — Until your next turn, any number of target opponents can't cast more than one spell each turn and can't attack with two or more creatures.
+ — Destroy target creature. Its controller creates a 1/1 white Citizen creature token.

Mass of Pitchforks
Enchantment (U)
Whenever you attack, create a tapped and attacking X/X Peasant creature token, where X is the number of creatures that attacked. Exile the token at end of combat.
The Valleyland settlers did not have the finest arms or the most skillful soldiers, but any would-be conqueror learned quickly to respect their claims nonetheless.

Mass Incarceration
Sorcery (R)
Spree
+ — Look at target opponent’s hand. You may exile a nonland card from it. For as long as that card remains exiled, its owner may play it. A spell cast this way costs more to cast.
+ — Exile target creature or planeswalker. Each player creates a tapped Treasure token for each permanent they control exiled this way.
Overload
"Equal treatment. How can this be unjust?" — Baron Bertram Greywater

Peaceful Existence
Sorcery (M)
For each creature, create a Pacifism token and attach it to that creature. (Those tokens have a mana cost of and are white Aura enchantments with enchant creature and "Enchanted creature can't attack or block.")
At last, it is done.

Nephalia Charm

Instant (C)
Choose one —
• Return target creature to its owner's hand.
• Counter target spell unless its controller pays
• Surveil 1, then draw a card.

Clean the Evidence
Instant (U)
Spree
+ — Target player surveils 3.
+ — Until end of turn, if target player would draw one or more cards, they investigate that many times instead.
+, Collect evidence X — Exile up to X target instant and/or sorcery cards from any number of graveyards. As long as those cards remain exiled, you may cast up to one of them.

Snafi, Three-eye Seer
Legendary Creature ─ Sphinx (R)
Flying
Whenever you would counter a spell, counter all other spells instead.
3/5
"The truth will out."

Hours on End
Sorcery (M)
Each player shuffles their hand and graveyard into their library, the draws seven cards and reveals their hands. You may cast a nonland card revealed this way without paying its mana cost.
Exile Hours on End.
Work, once ended, will always have begun again.

Thrull Propagator

Creature -- Thrull [C]
When this creature enters, you may sacrifice a non-Thrull creature. If you do, create two 1/1 black Thrull creature tokens.
Thrull weren't created to be able to reproduce -- but, then again, they weren't created to be able to overthrow their creators either.
3/1

Lingering Nightmare
Creature ─ Horror (U)
Menace, undying
Lingering Nightmare enters with X +1/+1 counters.
0/0

Death Deliverer

Creature -- Human Assassin (R)
Deathtouch
Whenever Death Deliverer deals combat damage to a player, that player loses half their life, rounded up.
Undermine (You may cast this for its Undermine cost. If you do, it can't block or be blocked and has "Whenever this deals combat damage, return it to its owner's hand.")
1/3

Necropotential
Enchantment (M)
Whenever you would mill a card, instead put that card into your hand and lose a life.

Lightning Barrage
Sorcery (C)
Lightning Barrage deals 1 damage to each permanent target opponent controls.

Frenzied Flame
Instant (U)
Choose one or both:

• Frenzied Flame deals 2 damage to target creature.
• Target creature must attack this turn if able.

Firebug's Glee
Sorcery (R)
Spree
+ — Firebug's Glee deals 2 damage to target opponent and each creature and planewalker that player controls.
+ — Destroy target land.
+ — Put a blaze counter on X target lands. They gain "At the beginning of your upkeep, this land deals 1 damage to you."

Stone Barrage
Sorcery (M)
Put a defender counter on target creature. Stone Barrage deals X damage to each creature with defender.
"Best way to remove a wall is to pummel it with a previous wall."
—Gutonk, ogre taskmaster

Talonvine Bulber
Creature ─ Elemental (C)
Hexproof
Whenever you play a land, if it's the second land you've played this turn, return Talonvine Bulber from your graveyard to the battlefield.
3/4
You have to take them out by the roots.