Its definitively good, but in not even sure its better than Transgress the Mind since it doesn't exile. That was one of the major appeals to Transgress, since its one of the only ways to perminately get rid of something (scrapheap jumps to mind).
I do think open heart will see play, but even in standard its nowhere near as good as inquisition of Kozilek would be. Turn 1 discard is pretty much exlusively better than T2, esspecially since there are so many other good T2 plays. This competes fot T2 with Winding Contrictor, Grim Flayer, Heart of Kiraan, Sylvan Advocate, siphoner, and countless others. A turn 1 discard effect is what black really wants to keep aggro in check.
I do think it will see play, but if the major threats being run are the God Cards, ishkanah, Avacyn, and Heart of Kiraan, this may habe a hard time finding a home
(I'm gonna like your reply KouriNick because I need to explain a bit more!)
We'll see. Just to get you thinking,
exile is great, but it rarely will matter until your opponent can find a card to reoccur it from the graveyard. Atm, I only see
Torrential Gearhulk and
Nissa, Vital force being played competitively.
(That being said, I probably wouldn't playing this card against a delirum deck, things like
Grapple with the Past and
Liliana, the Last Hope would be annoying.)
Also, something to consider; Standard Sets (Zendikar - Innistrad) will all rotate out after Hour of
Devastation is released! So Delirium won't be a factor!
Okay, let's think about it, you play it turn 2, like
Transgress the Mind, however, unlike
Transgress the Mind, you can get rid of
Sylvan Advocate,
Winding Constrictor or
Grim Flayer. (The major threats in Standard, as you've mentioned).
Since
Inquisition of Kozilek doesn't exist in Standard, only Modern. Standard format players only have access to
Harsh Scrutiny. Open Heart will, remove
Heart of Kiran.
Harsh Scrutiny and
Transgress the Mind won't!
You're correct, it won't remove Ishkanah, or
Archangel Avacyn, but I've seen neither played in competitive standard recently. (I only consider
Archangel Avacyn being a threat, simply because unless you know your opponent has her in their hand you can't judge when they'll
flash her into play.) - like
Gitaxian Probe, knowing is half the battle! (I wish
Telepathy was in standard!)
True enough, I didn't really explain why I thought it was better than Inquisiton of Kozilek, turn 1 plays are good, though I still think Open Heart has the potential to be better than
Inquisition of Kozilek mostly because you have more options, even if you can't play it turn 1. (The probability of getting
Inquisition in your opening hand is 7/60 = 11.7%)