Zanz has placed a taboo on instant kill cards that do not mention hp.
I know, but i always thought that the problem is
targeted instakill. This is a way of doing it without targeting.
Is there some thread with Zanzarino's words about instakill? Just to be informed!
^^This. It's just that way, sorry. Even though, there are always creative ways of doing insta-kill without breaking the taboo (see skull shield? It's even worse than insta kill). You might find a way if you look for it. I like the idea of it killing the creature with the lowest atk/hp that attacked you...
I can try to find a way to use hp (something like: kill the first creature attacking that has HP!
).
No seriously, i understand your point, but i think that this is not worse that the skull shield, so i want to try to bring this idea further.
The idea of killing the creature with lowest atk/hp is really good, but in that case the shield should costs less, i think, or maybe should not have a limited number of turns.
With the shield modified that way you can run an aflatoxin on yourself to counter the effect every turn and render the shield useless. Same behavior for creature generators, like FFQ and Pharaoh.
Also, i'm thinking that switching from "the first attacking creature" to "the last creature summoned" could bring some interesting defensive strategies (for the opponent, of course), and it's easier to tell which creature will die next!
CURATOR COMMENT
-Please add the ' 
' icon after the card's COST section in the table. (It should read '6 ' instead of just '6' for example, so that it matches the card image; otherwise, you're implying it requires a generic amount of quanta)
It will be done!
-*Although I won't discard the possibility that you drew this (or designed this completely) from scratch, could you also provide any links to any images you modified for the card art? If you modified a pre-existing image, you need to provide the page link where the art you used is located.
* = ignore this if you drew the image yourself from start to finish
I've done the piece all by myself and i can provide a layered PSD to prove it (ask to me if it's needed).
Lovely idea, although the shield name is a bit of a stretch in comparison to some of the other 'one-name' shields (Hope, Procrastination, & Wings). A good thing you noted that Iridium Warden trick; I would have never thought of that as a way to counter the shield's effects. 
Also, WELCOME to the Card Ideas & Art (or 'CIA' 
) board, TheManuz! If you have any questions regarding card ideas and whatnot, feel free to ask me or any of the other Card Curators for assistance. Thanks.
Thanks for your review. I will ask you if i need something!
