Rambunctious Jury X1W
Enchantment (U)
When Rambunctious Jury enters the battlefield, create X 1/1 red Goblin creature tokens. Then exile target creature with mana value less than or equal to the number of Goblins you control until Rambunctious Jury leaves the battlefield.

Votes: netn10, Raptorchan

Hip Check G
Sorcery
Target creature you control deals damage equal to its toughness to target creature you don't control.

Votes: netn10, LandellXil0cent Eon Containment Field 3W Enchantment - Aura (R) Enchant player When Eon Containment Field enters the battlefield, enchanted player skips their next turn. When Eon Containment Field leaves the battlefield, enchanted player takes an extra turn after this one and you draw...

Portal From The Beyond C
Enchantment (R)
C: Exile the top card of your library.
Sacrifice Portal From Beyond: Return target face-up permanent card you own in exile to the battlefield if its mana value is less than or equal to the number of cards you own in exile.

Maleva, Bone Augur [sym=b][sym=g] Legendary Creature - Human Shaman (Uncommon) Deathtouch [sym=w], Exile target creature card from a graveyard: Surveil 1. If the exiled card entered the graveyard from the battlefield this turn, draw a card. "In the future, I can see: wasted land and poverty.&q...

Votes: FrostBoss216, netn10 Revolving Wilds Land (U) T: Look at the top 4 cards of your library. You may put a basic land card from among those card onto the battlefield tapped. Put the rest on the bottom of your library in any order. If a land was put onto the battlefield this way, the owner of Rev...

Yenna the Protector 1GW
Legendary Creature - Elf Noble (R)
You may cast Aura spells as though they had flash.
U: The next Aura spell you cast this turn has split second. (As long as that spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
3/4

As I understand: Make a card based on something Hasbro sells (e.g. https://shop.hasbro.com/en-us), but not one of the things they've already done (e.g. Transformers, D&D, My Little Pony).

Votes: Raptorchan, void_nothing

Omenpath Lurker 2B
Creature - Leech Horror (R)
Ward 2
Whenever a planeswalker enters the battlefield, remove a loyalty counter from it and put a +1/+1 counter on Omenpath Lurker.
3/2

IIW: Ixalan vampires

Votes: Komandon, netn10

Applied Fractalomics 1G
Enchantment (U)
When Applied Fractalomics enters the battlefield, learn.
Whenever you learn, you may create a 0/0 green and blue Fractal creature token. Then put a +1/+1 counter on a Fractal you control.

IIW: Enlist

Votes: bravelion83, void_nothing

Ptyrant 4GR
Creature - Dinosaur (M)
Flying
Whenever Ptyrant enters the battlefield or attacks, it deals damage equal to its power to up to one target creature without flying defending player controls.
5/5

Votes: Rithaniel, void_nothing

Blast with X-Rays 2B
Instant (C)
Target creature has base power and toughness 1/1 and is a black Skeleton until end of turn. Its controller gets 2 rad counters.

IIW: Traps

Votes: Raptorchan, netn10

Kami-Touched Explorer 2U
Creature - Spirit Human
Instant and Sorcery spells you control and Instant and Sorcery cards in your hand, library, and graveyard are Arcane.
2/3
////
Survey the Spirit Realm 1U
Instant - Arcane Adventure
Draw a card.

IIW: Learn

@CunningGabe I'm not sure this card is feasible with the rules as currently printed. There is no noncreature card with outlast, and there isn't anything that indicates outlast could be printed on noncreatures (That I've seen. I could be wrong.) I can confirm that currently outlast can only go on cr...

Votes: void_nothing, netn10 Cadaver Crawler {B/G} Creature - Fungus Snail (R) {B/G} : Exile target creature card in a graveyard. If no other card exiled with Cadaver Crawler has mana value greater than or equal to that card, put a +1/+1 counter on Cadaver Crawler. Always looking for a larger "s...

Votes: Raptorchan, Rithaniel

Combat Dumbbells 2
Artifact - Equipment (U)
Equipped creature gets +1/+0.
When equipped creature attacks, it gets -1/-1 until end of turn. At the beginning of your end step, put a +1/+1 counter on that creature.
Equip 1

IIW: Poetry

Votes: Sporegorger_Dragon, netn10

Confused Celebrant 1G
Creature - Satyr
Whenever a spell or ability counts the number of creatures in your party, add one to that count.
"Adventuring? Where's the wine?"
2/2

Votes: void_nothing, Raptorchan

Hit and Run 3R
Instant (U)
Target Vehicle you control becomes an artifact creature until end of turn. It deals damage equal to its power to target creature or planeswalker.

IIW: Arcane (the instant/sorcery subtype)

marioguy3 You say that it's quite a bit of work to get a counter on the creature -- but you can outlast even while the land is not animated. (At least, that was my intent.) The idea is that you would build up a few counters first, and only start swinging once you had a couple of counters on it, pro...

Votes: Raptorchan, netn10 Iridescent Prospect Land (R) T , Pay 1 life, Sacrifice Iridescent Prospect: Search your library for a basic land card and put it onto the battlefield tapped, then shuffle. X : Until end of turn, Iridescent Prospect becomes an Elemental creature that is all colors and with p...

Qal Sisma Legendary Land — Forest Island Mountain (Rare) ( T : Add G , U , or R .) Ferocious — Qal Sisma enters the battlefield tapped and with a stun counter on it unless you control a creature with power 4 or more. Ferocious — T : Add GUR . Activate this ability only if you control a creature wit...

Votes: netn10, Ink-Treader

Sand Witch 2B
Creature - Sand Warlock (R)
B: Target creature becomes a Sand creature. (It loses all other creature types.)
At the beginning of your upkeep, put a -1/-1 counter on each Sand creature.
When Sand Witch dies, create a Food token.
2/3

Votes: RattingRots, bravelion83 Repulsion Shield U Enchantment (U) When Repulsion Shield enters the battlefield, return target creature to its owner's hand. Whenever a permanent with the same name as the returned creature enters the battlefield, sacrifice Repulsion Shield. When you do, counter targe...

Votes: netn10, void_nothing Conclave Retreat Land (R) Conclave Retreat enters the battlefield tapped. T : Add W or G . 2GW : Transform Conclave Retreat. ////// Selesnya's Blessing ( {G/W} ) Enchantment Whenever you cast a green spell, put a +1/+1 counter on up to one target creature you control. Whe...

Votes: lookingupanddown, netn10 Twice-Blessed Champion 2W Creature - Human Samurai (R) Twice-Blessed Champion enters the battlefield with a first strike counter and a +1/+1 counter. Remove a first strike counter from Twice-Blessed Champion: Twice-Blessed Champion gains double-strike until end of tur...