Train Heist
Sorcery (R)
Gain control of target creature and target Vehicle until end of turn. Untap them. They gain haste. That creature crews that vehicle. If that vehicle dies this turn, sacrifice any creatures that crewed it. When that vehicle deals combat damage to a player, create X treasures where X is its power.

Shroud of Nissa
Legendary Artifact - Equipment (R)
When Shroud of Nissa enters, name a card.
Equipped creature gains hexproof and "Whenever this creature deals combat damage to a player, you may cast the named card from your graveyard without paying its mana cost."
Equip

Shroud of Fiery Mental Confusion Pain
Sorcery
Untap target creature and gain control of it until end of turn. Until end of turn it gains haste, gets +1/+0, and has "When this creature deals damage to a player, that player loses 5 life."

Psychic Confusion
Sorcery
For each card in target opponent's hand, they may tap an untapped creature they control and put a stun counter on it. If they don't, they discard that card and draw a card.
"Many odd things happen if this Pokémon is close by. For example, it makes clocks run backwards." —Pokédex Entry, Kadabra

Psychic Connection
Enchantment (R)
Whenever an opponent casts more than one spell on a turn, you may sacrifice Psychic Connection. If you do, take an extra turn after this one.

Sever Connection

Instant
Destroy target creature. If it was paired or had Partner or Partner with, put a -1/-1 counter on each of its paired and/or partner creatures.

Severed Arm
Creature - Zombie (U)
When a creature you control is dealt damage, if it's still on the battlefield, you may put a -1/-1 counter on it. If you do, return Severed Arm from your graveyard to the battlefield.
1/1
Thrak wasn't sure if he should be disgusted or admire its resolve.

A Farewell to Arms
Enchantment — Saga
I - This Saga deals 3 damage to target tapped creature.
II - Each player returns a creature they control or a creature card in their graveyard to their hand.
III - Destroy all creatures.
IV - Return target creature you control and target creature you don't control to their owners' hands.
V - Exile all graveyards.

Farewell to Heroes
Sorcery (R)
Exile all historic permanents.
To kill a hero, start with their legacy.

Military Complex
Land (U)
Military Complex enters tapped unless you control a soldier.
: Add or .
, sacrifice Military Complex: Put a +1/+1 counter on target soldier.

Military Industrial Complex
Enchantment
At the beginning of each player's combat phase, that player may pay , where X is the number of industry counters on Military Industrial Complex. If they do, they put a +1/+1 counter on each creature they control.
Whenever a player attacks, they put an industry counter on Military Industrial Complex and create that a tapped Treasure token for each attacking creature they control.

Industrious Familiar
Creature — Changeling (U)
If you would draw a card, you may put Industrious Familiar from your hand onto the battlefield instead.
Flying
You have no maximum hand size.
1/1
Cat, rat, bat...many forms with only one purpose. And one desire.

Familiar Face

Creature - Shapeshifter
You may have Familiar Face enter the battlefield as a copy of a creature that entered the battlefield under your control this turn.
0/0

(feels like being more annoying to use than Mirror Image should be cheaper)

Yeah, it's like Double Major.

I Will Face God and Walk Backwards Into Hell
Scheme
When you set this scheme into motion, choose any number of lands you control. Each other player may choose up to that many lands they control. Then, exile all permanents not chosen this way.
"To ask me to surrender is to show you never knew what you faced."

Walk With Me In Hell
Sorcery (R)
Destroy two target creatures, then return those cards to the battlefield under their owner’s control.
Now You've Got Something to Die For.

Any Lamb of God fans?

Walker of the Three Temples
Creature - Giant Warrior
Walker of the Three Temples has double strike if it has at least two sword counters. Otherwise, it has first strike if it has at least one sword counter.
Walker of the Three Temples enters the battlefield with three sword counters.
, Remove a sword counter from Walker: Destroy target artifact or enchantment.
, Remove two sword counters from Walker: Destroy target attacking or blocking creature.
3/3

Come at my Beckons
Sorcery (R)
Target opponent reveals their hand. You choose a card revealed in this way and manifest it.