Subject16, void_nothing Horde's Rush 2R Sorcery (common) Create a 1/1 red Goblin creature token with haste. Creatures you control get +1/+0 until the end of turn. Triumph (Then, if you cast this from your hand, exile it with three triumph counters on it. Whenever a creature you control deals combat ...

bravelion, Zemoo

Blazing Omen R
Sorcery (rare)
Blazing Omen deals 3 damage to any target. Exile the top thirteen cards of your library.
"The fires raged, and a figure stood, ready to bring his sword down on me. As he made his slash, I woke up in a cold sweat."
—Aradina, prophet

[mention]void_nothing[/mention] realized it a couple of hours after I posted but forgot to go back and switch it. it be like that sometime

Guardman, Subject16

Emnity 3B
Creature - Incarnation (uncommon)
Wither
At the beginning of your upkeep, if Emnity is in your graveyard, you may pay 2B. If you do, put a -1/-1 on target creature.
3/2

IIW: Pre-existing planeswalkers in new colors.

foldingmusic, slimytrout Ride of the Returned [sym=BG][sym=BG] Instant (rare) Creatures you control gain persist until the end of turn. (When one dies, if it didn't have a -1/-1 counter on it, return it to the battlefield with a -1/-1 counter.) "Every year, when the moon turns blood-red, the de...

ayssia, RattingRots

Scorched Earth 1R
Enchantment - Aura (common)
Enchant land
At the beginning of enchanted land's controller's upkeep, they may pay 2 life. If they don't, destroy enchanted land.

Ink-Treader, Subject16 Naya Brutalist RGW Creature - Human Warrior (uncommon) Whenever a gargantuan creature enters the battlefield under your control, Naya Brutalist deals 1 damage to each opponent, then you gain 1 life. (Creatures with combined power and toughness 7 or greater are gargantuan.) 4/3...

dyd, Subject16

Go Fetch R
Sorcery (uncommon)
Go Fetch deals 1 damage to target creature.
Tap an untapped Hound creature you control: Return Go Fetch from your graveyard to your hand.
"Good boy!"

IIW: Cards that have abilities in your library

kwanyeegor, voidnothing

Planar Extinction 1UUBBRR
Sorcery (mythic)
Destroy all non-planeswalker permanents. Each player draws cards until they have seven cards in their hand.
As Skalla burned, Bolas laughed.

For Subchallenge 2 of the new MCC, does reminder text count as rules text? Asking since one of the mechanics requires a mana symbol in the reminder text.

Ink-Treader, voidnothing Above 2WU Sorcery (uncommon) Put target nonland permanent on the top of it's owner's library. Fuse (You may cast one or both halves of this card from your hand.) // Beyond BG Sorcery (uncommon) You gain 1 life for each card in target player's graveyard. Shuffle that player's...

netn10, slimytrout

Multiversal Clash 1G
Enchantment (rare)
Whenever a planeswalker enters the battlefield under your control, it deals damage equal to the number of loyalty counters on it to target creature or planeswalker.
1G, Sacrifice Multiversal Clash: Proliferate, then draw a card.

slimytrout, netn10

Fragile Aegis 1W
Enchantment (rare)
Other permanents you control have indestructible.
Whenever you lose life, sacrifice Fragile Aegis.
Power is a glorious tool, but one that can disappear with the first sign of weakness.

RattingRots, bravelion83

Utopia Guardian 1G
Creature - Human Druid (common)
G, T: Add one mana of any one color. If you control another Druid, add two mana of that color instead.
"To protect my home, I would pay any cost."
2/1

BeneTleilax, Subject16

Filligree Innovationist 1GWU
Creature - Human Artificer (rare)
Fabricate
At the beginning of your upkeep, choose one—
• Populate.
• Proliferate.
2/2

IIW: Four-color commons/uncommons

Icarii - Downside mechanics are never fun, so I don't really like Diffusion. As for the card itself, it's either a worse Precision Bolt or a worse Chandra's Pyrohelix, both of which are… really bad cards (assuming I'm understanding Diffusion correctly.) You don't. You can do 3 damage to one creatur...

Anila, the Clairvoyant 2U Legendary Planeswalker - Anila (rare) +1: Reveal the top two cards of your library. Your opponent chooses one. Put that card in your graveyard and the other in your hand. -2: If there is a card named Divination in your graveyard, draw two cards. -7: Search your library for...

InkTreader, netn10 Siphyrs, the Repentant 1WB Legendary Creature - Demon Noble (mythic) Flying Siphyrs enters the battlefield with a token copy of Heliod's Punishment attached to it. Although sentenced to toil in an endless damnation, with the weakening of the Underworld, his torment is no longer et...

Henlock - I like that you're using different costs for the card and it's ability, but considering both are in both colors, you could have probably picked one or even gone for hybrid colors. Also, 1UU for a 2/2 flyer with upside is understatted (Academy Drake), but I think the bestow ability is fine...

netn10 - Transmute as a mechanic is pretty powerful in general, and pairing it with an efficiently costed spell that allows for incremental value throughout the game (surveil is better than scry and surveil 5 is probably almost as good as drawing two cards), so I think this is too powerful. mariogu...

(yo void why you gotta snitch on me :p) InkTreader, Henlock Voidborn Hydra X Creature - Hydra (uncommon) Voidborn Hydra enters the battlefield with two +1/+1 counters for each C spent to cast it. When the rift opens, you still have a chance. When you hear the hissing, it's too late. IIW: Cycling

netn10, voidnothing

Vampiric Domination 5B
Sorcery (mythic)
If target player's life total is 10 or less, you control that player during their next turn. Exile Vampiric Domination.
"When the blood's already flowing, it's easy to get a taste."

JovialJovan, Subject16

Assemble the Troops RWB
Enchantment (uncommon)
Whenever three or more creatures you control attack, create a 1/1 white Warrior creature token with lifelink tapped and attacking.
Sacrifice a Warrior, RWB: Assemble the Troops deals 3 damage to any target. You gain 3 life.

voidnothing, Henlock

Glorious Transcendence 1WU
Enchantment (uncommon)
At the beginning of your end step, you may return a creature you control to it's owner's hand. If you do, draw a card.
4WU, Sacrifice Glorious Transcendence: You draw two cards and you gain 2 life.

bravelion83, Henlock

Evanora, the Brewer BB
Legendary Creature - Human Shaman (mythic)
Lifelink, deathtouch
WUBRG, Sacrifice five permanents: If there are five colors and five different converted mana costs among permanents sacrificed this way, target player loses the game.
1/3