But that's a spell.
Jyiber is proposing a permanent that cancels only 1 spell, not a creature, not a permanent.
It can be countered, for example by a creature with butterfly effect, or by a Pulverizer, or by a mutant with steal or destroy.
I saw the spell you linked, and didn't like it very much.
However i find this version of the idea simple but interesting.
the difference between perm/creature/spell is about as significant as the element, when its not your original idea, its completely insignificant. it would be like me looking at spell ideas and then turning them into creatures which can use the spell as a skill. it doesnt bring anything new to the table if its simply taking an already proposed mechanic and then changing the form in which it is delivered.
I understand your point, but the form and the element are relevant for the success of a card.
For example, consider Shard of Patience:
Spell form: not good. Permanent form: good card.
Or try to think if Dissipation Shield was
![Darkness :darkness](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/darkness18x18.png)
or
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)
. Those elements can produce very high quantities of quanta (Devourers and RoLs), and the card would be perceived in a different way.
Anarook's Trap!, in my opinion, doesn't work because it's Other, i think it would be more appropriate giving it a specific element. Of course this is only my opinion.
I support giving credit when required. I also think that the better implementation of a common idea (counter is a VERY common idea) should win.
I also think that claiming "MINE!" has sense for original mechanics. It makes sense for your Totems, for example. Or for OldTrees' Soul Pillar. Or many other cards.
It doesn't make sense for mechanics like "use target creature skill" or "all spells must target this permanent/creature", because these are common mechanics, and the CIA is spammed with many implementations of them.