Hello cardsmithers. I bring you two cards. An old one (left) and a recent one (right).
I'm not sure about the wordings on these. And I can't come up with real cards to use as references, so I have come to you. Are these cards well worded?
“Whenever an opponents casts the named spell” might make it feel a bit better.
The first one feels off to me as well. I’d recommend “Counter target spell with a converted mana cost equal to the converted mana cost of target artifact you control.”
The first one should probably read "an artifact you control" instead of targeting for no obvious reason.
The choosing of the name on Mojo Prognosis should be a separate ability to the scrying bit (since the put-on-library bit is also an ETB then it's probably fine as part of the same ability).
Comments
I know that there is something off with the second, but I don’t know how to phrase it right.
The first one feels off to me as well. I’d recommend “Counter target spell with a converted mana cost equal to the converted mana cost of target artifact you control.”
The choosing of the name on Mojo Prognosis should be a separate ability to the scrying bit (since the put-on-library bit is also an ETB then it's probably fine as part of the same ability).
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Flash
When Mojo Prognosis enters the battlefield, choose a card name. Put all spells with
that name into their owners' libraries third from the top.
Whenever an opponent casts a spell with the chosen name, scry 3.
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Also I think 2 mana is a bit too cheap for this.
Anytime!