If a spell has any ONE of the 3 options the spell will work. If it has none of those things, counterspell will not work.

unbelievably bad change for this. Good luck counter spelling anyone that has a high con. 

In old version: The table is in high stakes as the lich now uses its power word death on the cleric. The wizard has one chance to counter it. IT SUCCEEDS. The table cheers as they survived that spell and can continue teamworking fighting the lich.

New Version: The table is in high stakes as the lich now uses its power word death on the cleric. The wizard has one chance to counter it. It succeeds. The Table sighs in relief knowing that they survived that action, but comforting the cleric knowing her character WILL die in the next round when it casts it again.

The worst part about this spell is that even if it succeeds in say preventing the BBEG from casting Power Word Kill on the Barbarian they can still just cast it next turn! And you've wasted a 3rd level spell to delay the casting of a spell.

Looking at some of the new Stat blocks like Vecna's or the Apprentice Wizard they don't have spell slots they can just cast each of these spells so many times a day. Will this consume the use of that spell or will it give them it back?

(Stat Block Apprentice Wizard)

Legacy - 1st level (2 slots): burning hands, disguise self, shield

MP:MotM - 1/day each: burning hands, disguise self, mage armor

So if I'm understanding this, they've removed upcasting the spell at a higher level and removed automatically countering a spell of lower level.   So, a 20th level caster uses counterspell  on a first level caster using a cantrip, and if the 1st level character rolls well enough then the epic level archmage fails to stop comparatively the weakest caster in the game.  Correct?

No the wording is specific to "if cast with a slot", so if it s once per day powerword kill they would lose that if they get countered. Basically players are less likely to lose their slots but are more restricted in spell casting (the new spell casting rules only prevents multiple spells using spell slots, so if a creature has 3 per day misty step, and 3 per day fireball then that creature could cast misty step and fireball on the same turn)

As the new design has progressed to NPCs and Monsters getting per day castings, if they get countered they would lose it for the rest of the day.

From the perspective of using Counterspell against a boss monster, this is a huge nerf. Not only can it be shut down with Legendary Resistance, but if they have proficiency with Constitution saves, you might as well not bother, especially if they have Magic Resistance to get advantage on the roll as well. If you're tanky, your spells are all but guaranteed to go through. 

This is a nerf for wizards, this is a bigger nerf for abjuration wizards.

In the 2014 version, it was a matter of two spellcasters pitting their powers against each other. What level spell slot do you use? And if your an abjuration wizards, you are better at it. It could be a gamble, and it would make for amazing stories.

The 2024 version feels about as effective and interesting as throwing a rock at the spell caster. 

As a 40 year vet of D&D this finally brings back Spell Power to Casters.

A lvl 5 Caster with Counter spell should not "Auto" Counter/Dispel spells of higher lvl Casters.

Now its a test of Power to see if you can destroy/counter the casting of someone elses spells. 

As it should be.

Quote from Dungeon_Of_Terra >>

No the wording is specific to "if cast with a slot", so if it s once per day powerword kill they would lose that if they get countered. Basically players are less likely to lose their slots but are more restricted in spell casting (the new spell casting rules only prevents multiple spells using spell slots, so if a creature has 3 per day misty step, and 3 per day fireball then that creature could cast misty step and fireball on the same turn)

As the new design has progressed to NPCs and Monsters getting per day castings, if they get countered they would lose it for the rest of the day.

This is a huge point that is being overlooked. Monster statblocks are being moved away from spell slots and instead using "x per day" casting of spells. People are worried that Counterspelling the lich's Power Word Kill will just delay the death to the next round. But not once the 2024 version comes out saying they can cast it once per day. The lich is losing the ability to cast it for the rest of the day if counterspelled!

I’m glad this was nerfed into the ground, as it was way too strong before. 

This feels bad to me, not necesarily from a mechanical standpoint, but instead of my character being cool and having a high spell modifier (which means he would be good at his casting) it's just a boring concentration save.

Well, that sucks.

If they fail i'll still have them lose the spell. Its also still an instantaneous reaction so you can counter spell a counter spell. If you are casting a 9th level spell and dont also have a counter spell somewhere to then force them to make a save too then thats kinda on you. 

can a 5th level wizard cancel a 20th level caster's spell? Sure. But when the 20th level caster makes you save to even cast that counter at a much higher dc it is a lot less likely.

Creatures typically have x/day spells, so no spell slots are used, thus they lose their use of the spell

Quote from GammaRaysForDays >>

If they fail i'll still have them lose the spell. Its also still an instantaneous reaction so you can counter spell a counter spell. If you are casting a 9th level spell and dont also have a counter spell somewhere to then force them to make a save too then thats kinda on you. 

can a 5th level wizard cancel a 20th level caster's spell? Sure. But when the 20th level caster makes you save to even cast that counter at a much higher dc it is a lot less likely.

You will no longer be able to cast Counterspell to counter someone who is trying to Counterspell a leveled spell you are trying to cast. (Only monsters will be able to that to you!)

On a turn, you can expend only one spell slot to cast a spell.

Quote from Vladgdc >>

This feels bad to me, not necesarily from a mechanical standpoint, but instead of my character being cool and having a high spell modifier (which means he would be good at his casting) it's just a boring concentration save.

 Not a concentration save, but a Constitution saving throw. (You don't get to use features that buff concentration checks.)

If this is true, then it is a buff for players.

I am playing an anti-magic sorcerer meant to shut down other casters at level 14. When I counter-spell now, it is based on their save (or legendary resistance, which we need to eat up anyway). And if they fail it (chaos sorcerer, luck, and other abilities to impose disadvantage or negatives), they lose their action, and a magic ability they can't renew mid fight. 

While if it is cast on me, I gain the advantage of every buff to making a con save to resist it, burning their slot. 

The change makes thematic since in that you are stopping the spell from being cast (unlike dispel magic that turns the effect off after it is cast). 

I only see this really impacting player vs player negatively. Everything else will work fine.

Quote from PeteInCary >>

Quote from GammaRaysForDays >>

If they fail i'll still have them lose the spell. Its also still an instantaneous reaction so you can counter spell a counter spell. If you are casting a 9th level spell and dont also have a counter spell somewhere to then force them to make a save too then thats kinda on you. 

can a 5th level wizard cancel a 20th level caster's spell? Sure. But when the 20th level caster makes you save to even cast that counter at a much higher dc it is a lot less likely.

You will no longer be able to cast Counterspell to counter someone who is trying to Counterspell a leveled spell you are trying to cast. (Only monsters will be able to that to you!)

On a turn, you can expend only one spell slot to cast a spell.

 

 That I missed and it is damn big change too!