Momir Vig, Izzet Visionary

Legendary Creature - Elf Wizard

Whenever you cast a blue instant or sorcery spell, search your library for an instant or sorcery card, reveal it, shuffle your library, then put the revealed card on top.

Whenever you cast a red instant or sorcery spell, reveal the top card of your library. If it's an instant or sorcery card, exile it. You may cast it until the end of your next turn.

2/2

Vig is already insane in Simic. But hoooly shiz, this version seems superstupidly broken.

I'd like to see a boros angel.

Invading Brute

Creature - Ogre Berserker

Haste, Trample, Menace

This creature attacks each combat if able and can't attack its owner.

At the beginning of your end step, the last player that has been attacked by this creature this turn gains control of it.

5/5

Wild

Clicked on the list because I wondered how you'd manage to do Taii as a phoenix tribal. Then I spoke out the name and audibly rolled my eyes. This earned you an upvote xD

Regarding any suggestions: You already have Boros Reckoner in here. How about also including Stuffy Doll, Brash Taunter and other similar effects?

Referencing Gargoyle Castle.

Astrik, Guardian of the Tower

Legendary Creature - Human Wizard

Partner with Shirrim, Master of the Tower

Gargoyles you control have Hexproof and can attack as though they didn't have defender.

Whenever a gargoyle you control deals combat damage to a player, draw a card, then goad target creature that player controls.

2/3

Shirrim, Master of the Tower

Legendary Artifact Creature - Gargoyle

Partner with Astrik, Guardian of the Tower

Flying, Indestructible, Defender

Creatures your opponents control lose Shroud, Hexproof and Ward and can't have or gain Shroud, Hexproof or Ward.

5/2

The 99 might not be that clear, but I like these designs too much to change them.

Sooo...

...if you think I met the challenge, create a card for this deck. Otherwise, repeat.

I'm not sure how fast you want to burn them. But in case you want to do some hand-shaping until you can explode into either a table-kill or at least a big turn that sets you up for a win within some rounds, you might want to try Neheb, the Eternal. Casting Flame Rift main phase 1 to have 12 mana in main phase 2 is fun.

Whenever I play the deck, I feel like a teen with way too much fireworks at hand.

Syr Nightshroud, Midnight's Grasp

Legendary Creature - Human Knight

Fear

When ~ enters the battlefield, you each opponent sacrifices X creatures.

Whenever another creature dies, you draw a card, lose 1 life and put a +1/+1 counter on this creature.

3/3

Blue is left.

You're welcome, glad I could help :D

Off of that tutoring-suggesting above, I tried to find a card that finds Minion. Staying in red only, I found two.

Imperial Recruiter is expensive and isn't modern legal, but would obviously do the the job.

Pattern Matcher might be interesting here, but isn't that great, unfortunately.

Ever considered Sarkhan's Triumph to maybe shrink your dragon toolbox a little? Also, Kolaghan Warmonger seems like a great addition to the deck.

Which is hilarious, btw. Love the idea!

Trill, Unbeatable Forerunner

Legendary Creature - Human Rebel

Vigilance

You may activate abilities of creatures you control as though those creatures had haste.

, : Search your library for a Rebel permanent card with mana value equal to X plus 1 or less, put it onto the battlefield, then shuffle.

3/4

Create a legendary Dauthi.

Mileva, Boros Strike-Leader

Legendary Creature - Human Soldier

Vigilance, First Strike

Sorcery spells you cast cost less to cast, where X is the number of other sorcery spells you've cast this turn.

2/2

"Proper preparations don't usually replace speed. But if you're that prepared..."

Tajic, to Mileva

Repeat

TypicalTimmy:

This is a design I made before that I'm quite proud of. Maybe it fits Acorn?

Nastja befriends Acorn

Enchantment

When this enchantment enters, create a number of Food tokens equal to the number of legendary permanents you control.

Sacrifice X foods, tap an untapped legendary creatures you control: Create X 1/1 green squirrel creature tokens. If X is 2 or greater, draw 2 cards, then return this enchantment to its owner's hand.

Wild.