Render Silent can still be countered, and Flurry of Objections doesn't stop your opponent from casting anything later, so I don't quite get this comparison.

Review the timing of the copies for me? And what happens if they don't have anything to counter?

When you cast Flurry of Objections, before it starts resolving, you put a triggered ability on top of the stack. That ability resolves, making three copies of Flurry, which you do not get to change the targets for, so all four Flurries are targeting the same thing. The copies will resolve, and then the original Flurry will resolve, and then (if it hasn't been countered), the targeted spell will resolve.

If at any point the targeted spell gets countered, the remaining Flurries will fizzle and not resolve. If the targeted spell somehow leaves the stack before the triggered ability resolves, the copies will still target it, but it won't be a legal target, so they'll fizzle.

Freezing Fortress -
Enchantment
Whenever a creature attacks you or a planeswalker you control, that creature’s toughness becomes 1 until end of turn.

Geomancy Lessons

Sorcery
Destroy target land. Draw two cards.

I made this card for one of the game threads and was surprised it didn't exist in this form.

Bazaar of Krul
Legendary Land (M)
: Add .
: Tap target creature.

It's strong to be sure, likely to strong as I think every deck would play one. I guess that's why it doesn't exist.

Mystifying Maze and Prahv, Spires of Order are similar

Interestingly, there's never been a land version of Master Decoy/Goldmeadow Harrier. Yes, it's weaker, maybe unplayable, but it's certainly weak enough to drop the legendary rider

Goldmeadow v. 1
Land
: Add .
, : Tap target creature.

Goldmeadow v. 2
Land
This land enters the battlefield tapped
: Add .
, : Tap target creature.

what do you mean weaker, it's broken as all hell

Bazaar, Goldmeadow or both?

The land. The creatures are strong, but mostly only in draft.

My land, Dud's land, or both?

All three of them.

Yeah, I posted prahv and maze partly to show what the power level should be. The ability should cost about 5 to activate. Maybe more because it can do the “double tap” when being used aggressively

Pick Off
Enchantment
At the beginning of your upkeep, destroy target creature.

Increasing Isolation
Enchantment
At the beginning of your upkeep, return target creature to its owner's hand.

Dunno what these should cost but that's a development issue. The blue one could have a 'may' in it but the black one probably shouldn't cos you know, it's black.

I can see Pick Off having the Pestilence clause.

Agreed. My first thought was Call to the Grave. For that card you can often get around the drawback as long as you are playing zombies but it can die to a board wipe.

End Harbinger
Creature-Demon (R)
End Harbinger enters the battlefield tapped
Whenever End Harbinger deals damage to a player, that player loses the game
1/1

Scrappy Cadet
Creature - Human Soldier
Vigilance
"I wanna see what I'm made of. And I want others to see it, too."
1/2

More like Crappy Cadet

Burnwillow Tender —
Creature — Elf Shaman
: Add or . Each opponent gains 1 life.
1/1

Could probably only be printed in a Modern Horizons set, but still a lot of fun.