Re: Resonance. Later that end step you can cast more spells though? I have trouble imagining the timing on this one.

• Timing is indeed problematic.
• On high CMC things such as this, the clause to get an additional copy is trivial and most of time unavoidable
• The mechanic encourages you to do something you don't want to do: Not to cast spells.

I would try to come up with suggestions, but I don't know what's the flavor supposed to be about or what purpose the mechanic would fill.

Six mana to destroy two creatures seems reasonable in black. Good; but not unreasonably so.

But I agree it's very fiddly, and likely to lead to.

"My turn? Cast this, end turn, cast this as well. Get the first one again. Your turn? Cast this. End? Ok, I get a copy of that other one frmo back then, and this one; I think? Abnd which of yours go off now?"

Very fiddly, and seems likely to encourage pure-blue-boring play.

I changed "during the next endstep" to "beginning of the next endstep." Does that fix the timing issues?

The mechanic was designed with the idea that for the sorceries, the player has played too many spells previously and emptied their hand of other playable spells that turn, and for instants, that the Resonance card would be the only instant they're casting that turn.

There's no actual flavor for the card. It was a creature removal spell that I tacked on an arbitrary name to.

It's still a hassle since it features a delayed (and conditional) trigger + You can still cast other spells afterwards during that end step.

Maybe something like: ?

> Resonance (You may cast a copy of this spell if you haven't cast another spell this turn. If you do, you can't cast spells for the rest of this turn / until your next turn. You may choose new targets for the copy.)

Not sure if that works... It might need to be wrapped inside some kind of "then you may resonate" structure to stop shenanigans.

Is it important that the copy is cast during the same turn?

> If this is the first spell you cast this turn and it's not upkeep, exile it as it resolves. When you cast another spell this turn, bury this. At the beginning of the next upkeep, you may cast this card from exile without paying its mana cost.

Apply some reminder text magic to fit it into a text box. There are certain other combinations that work if e. g. you are willing to have resonance work only from hand, you can look at rebound reminder text.

EDIT: Alternative idea to prevent casting spells afterwards:

> At the beginning of the next end step this turn, if you cast only this spell this turn, you may copy this spell with new targets. If you do, you can't cast spells this turn.

EDIT 2: I just realized the current reminder text doesn't free you from paying a mana cost - it repeats the whole casting process rather than copying the spell, so you need to pay costs for it. That's twelve mana. O.O

Okay, why are we waiting for the end step at all?

> You may cast this card from your graveyard this turn as long as this is the only spell you have cast this this turn. If you do, you cannot cast another spell this turn.

The phrase "this turn" loses all meaning, but what about:

> If this is the first spell you cast this turn, you may copy it. If you do, choose new targets for the copy and you cannot cast another spell this turn.

?

So I updated the reminder text for Resonance based off of the first edit version of reminder text from SecretInfiltrator. While I'd be happy to hear more ways to improve the wording, the endstep trigger for Resonance is the one element I'd like to keep.

I feel like the last sentence ("can't cast spells this turn") is extraneous. Only in very corner cases will you want to cast something else during the end step, so I think it adds unnecessary words and complexity