@dekumon
Not entirely impossible. Spike is a union monster who can count as one of those monsters when equipped, and Pinkie Pie’s effect means she doesn’t occupy a monster slot at all when on the field, so you could activate her win condition with only four full monster slots:
That said, her effect counts any monsters on the field, not just your side. So a card like Shien’s Spy could give control of one of your cards to your opponent, technically allowing you to use her effect with only three full monster slots :D
You should probably make her summon to the Extra Monster Zone, or that last effect is impossible. Either that or make her a Link-1 that uses only “Princess Pony - Twilight Sparkle” as material.
@Dink_
Only thing I would change, is she empowers Misty at the cost of Misty being banished instead of destroyed. Since she sits back and makes Misty do all her work XD
@Shady Mark
Fire Alicorn - Opaline
Cannot be Normal Summoned/Set. Must be Special Summoned by sending 1 “alicorn” type card to the graveyard and with the Spell Card “MISTY!!! THAT DRAGON FIRE!! GIVE IT TO MEEEEE” and cannot be special summoned in other ways. This card cannot declare an attack. Once per turn during your main phase, nullify all effects of any effect monsters your opponent controls; if successful, inflict damage to your opponent equal to half of all your opponent’s monsters ATK points. If you control “Lost Kindness - Misty Brightdawn”, you can equip it to this card, your opponent cannot destroy this card with card effects.
ATK / 3400 DEF / 2700
i designed opaline with doing more burn damage instead of being able to attack since she proclaims to be a fire alicorn and that she does BARELY anything threatening in G5’s Make Your Mark or Tell Your Tale until the MYM Season 5 finale. Also the fact that she stays in her castle for so damn much, her summon conditions are pretty hard to get and costly. The nullify effects come from the fact she apparently just knows Starlight Glimmer’s spell to steal cutie marks from hundreds ponies, and hence monster effects
@Dink_ @Setsugekka @Dink_ @Dirty Bit
It’s pretty powerful protection. Immunity to all effect-based removal, even your own. I figured it made sense, since she’s actually pretty hard to summon, to give her a broken protection effect that leaves her only vulnerable to attack :D
@Background Pony #8E91
I figured Empress made the most sense for her, since she technically rules over Equestria and the Crystal Empire :D
wait “if this card leaves the field by card effect”, does that mean by ALL monster effects & spell/trap effects? Also does that include being both destroyed & banished, this card can just come right back on your next standby?
Not entirely impossible. Spike is a union monster who can count as one of those monsters when equipped, and Pinkie Pie’s effect means she doesn’t occupy a monster slot at all when on the field, so you could activate her win condition with only four full monster slots:

your current filter.
your current filter.Only thing I would change, is she empowers Misty at the cost of Misty being banished instead of destroyed. Since she sits back and makes Misty do all her work XD
Fire Alicorn - Opaline
Cannot be Normal Summoned/Set. Must be Special Summoned by sending 1 “alicorn” type card to the graveyard and with the Spell Card “MISTY!!! THAT DRAGON FIRE!! GIVE IT TO MEEEEE” and cannot be special summoned in other ways. This card cannot declare an attack. Once per turn during your main phase, nullify all effects of any effect monsters your opponent controls; if successful, inflict damage to your opponent equal to half of all your opponent’s monsters ATK points. If you control “Lost Kindness - Misty Brightdawn”, you can equip it to this card, your opponent cannot destroy this card with card effects.
i designed opaline with doing more burn damage instead of being able to attack since she proclaims to be a fire alicorn and that she does BARELY anything threatening in G5’s Make Your Mark or Tell Your Tale until the MYM Season 5 finale. Also the fact that she stays in her castle for so damn much, her summon conditions are pretty hard to get and costly. The nullify effects come from the fact she apparently just knows Starlight Glimmer’s spell to steal cutie marks from hundreds ponies, and hence monster effects
Edited
@Setsugekka
@Dink_
@Dirty Bit
It’s pretty powerful protection. Immunity to all effect-based removal, even your own. I figured it made sense, since she’s actually pretty hard to summon, to give her a broken protection effect that leaves her only vulnerable to attack :D
I figured Empress made the most sense for her, since she technically rules over Equestria and the Crystal Empire :D
wroaw
thanks for the info!
As per offical ruling, yes.
Edited