The great thing is that near a third of the cards in the deck can target Orvar, the All-Form for duplicating. Before you go too far down this path: Orvar says "other" permanent you control, meaning targeting Orvar alone with an instant or sorcery will not trigger it. You can still do some...

Prophetic Dreams 2U
Sorcery (U)
Draw two cards.
Megaforetell 1U (During your turn, you may pay 2 and exile this card from your hand face down until the end of the match. Cast it on a later turn or a later game during this match for its foretell cost.)

IIW: You went the wrong way.

Manic Metamorphosis 3RR
Sorcery (R)
Each player sacrifices a permanent, then each player exiles the top card of their library and puts that card onto the battlefield if it's a permanent card. Repeat this process for each instant and sorcery card in your graveyard.

IIW: Cowards.

$100 Dollar Elemental $100 Legendary Creature - Money Elemental (MR) As $100 Dollar Elemental enters the battlefield, put $100 dollars on it. $100 Dollar Elemental has power and toughness equal to the amount of money you put on it. Creditcheck (Combat damage dealt by this to a player also cause you...

Undercity Servant 2B Creature - Zombie Advisor (U) Sacrifice another creature: Target player mills a card. Creatures you control named Persistent Petitioners have persist. (When a creature with persist dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control w...

Pachydermonium 2RGW Enchantment (R) Elephant creatures you control have trample, lifelink and haste. At the beginning of combat on your turn, you may put a creature card from your hand onto the battlefield. If you do, that creature becomes an Elephant with base power and toughness 3/3. Sacrifice th...

Meteor Fist R Sorcery (C) As an additional cost to cast Meteor Fist, sacrifice a creature. Meteor Fist deals damage equal to the sacrificed creature's power to target creature or planeswalker. If the sacrificed creature was legendary, Meteor Fist can't be countered and excess damage is dealt to tha...

Angry Ants RG
Creature - Insect (R)
Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.)
Whenever Angry Ants deals combat damage to a player or planeswalker, create that many tokens that are copies of Angry Ants.
0/1

IIW: a REALLY BIG punch

Ant Armada W Creature - Insect (R) At the beginning of your upkeep, put a march counter on Ant Armada. Whenever Ant Armada attacks, for each march counter on it, create a 1/1 white Insect creature token that's tapped and attacking. Exile those tokens at end of combat. Hurrah, hurrah. 1/1 IIW: a REA...

Insecticide 1BB
Sorcery (R)
Destroy all Insects.
"I cant beelieve it."

IIW: Anteaters

Bouncing Bee Bull 2G Creature - Insect Ox (U) Whenever Bouncing Bee Bull attacks, if it doesn't have trample, put a trample counter on it. Whenever Bouncing Bee Bull attacks, if it has trample and doesn't have flying, put a flying counter on it. Whenever Bouncing Bee Bull attacks, if it has flying,...

Snatchsquatch GUR Snow Creature - Yeti (R) Flash When Snatchsquatch enters the battlefield, if you control four or more other snow permanents, you may exile target spell. Whenever Snatchsquatch attacks or blocks, until your next turn, each opponent may play cards they own exiled with Snatchsquatch....

6. All cards are snow.

Cleric of the Scale 3WB Creature - Human Cleric (R) Deathtouch, vigilance When Cleric of the Scale dies, you may exile it and another target creature with power 2 or less from your graveyard in a face-down pile. If you do, shuffle that pile, then manifest those cards. (To manifest a card, put it on...

Ria, Sage of Impermanence RWB Legendary Creature - Human Shaman (R) You may pay 0 rather than pay the mana cost for Aura spells you cast. At the beginning of your end step, sacrifice an Aura. "Bonds are temporary. Strength is fleeting. Power is corruptible." 4/2 IIW: a REALLY BIG punch

Ursula, Shrewd Mercenary 1RR Legendary Planeswalker - Ursula (M) Sacrifice three Treasures: You may activate a loyalty ability of Ursula, Shrewd Mercenary an additional time this turn. [+2]: Create a Treasure token. [-3]: Exile the top two cards of your library. You may play those cards this turn. ...

4. All cards are Planeswalkers.

1. All cards are Planeswalkers. 2. One card is a nonland card with no mana cost. 3. One card has madness. Fuujin, Wind's Whisper ⬤ Legendary Planeswalker - Fuujin (M) Ninjutsu 1UU As long as it's your turn, Fuujin, Wind's Whisper is a 2/2 Human Ninja creature with hexproof and it can't be blocked. I...

1. All cards are Planeswalkers.

It looks like the deck is only 98 cards at the moment. Look pal, Rograkh may be smol, but you don't gotta disrespect him by not counting him as part of the 100! :P --- Corpsejack Menace seems like a oversight to not include - for one more mana than Branching Evolution you get a 4/4 body that can al...

Cleo, Curious Comrade 5
Legendary Creature - Cat Chimera (R)
Companion — Your starting deck contains only cards with English names that start with the letter C and land cards.
Convoke
Cascade
3/6

IIW: a REALLY BIG punch

Cryptic Closet U
Enchantment (R)
At the beginning of your upkeep, choose a card name, then mill a card. If that card has the chosen name, create a 1/1 colourless Skeleton artifact creature token.
"Who would hide a corpse in their own wardrobe?"

IIW: a REALLY BIG punch

1. All cards are Planeswalkers. 2. One card increases a creature's power and toughness. 3. All cards use -1/-1 counters. Ashling, the Soulshaper 2BB Legendary Planeswalker - Ashling (R) If one or more loyalty counters would be put on a planeswalker you control, you may put that many -1/-1 counters o...

6. All cards use -1/-1 counters.

Pathrazer Sliver 1
Creature - Eldrazi Sliver (U)
Slivers you control can't be blocked except by three or more creatures.
A tiny abomination that evokes the same primal fear as a towering monstrosity.
1/1

IIW: a REALLY BIG punch