Oath of Nissa
Oracle Text
When Oath of Nissa enters the battlefield, look at the top three cards of your library. You may reveal a creature, land, or planeswalker card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
You may spend mana as though it were mana of any color to cast planeswalker spells.
Card Rulings
1/22/2016 Each of the Oaths is legendary: if you control more than one of any particular Oath, you choose one to remain on the battlefield and the others are put into your graveyard.
1/22/2016 The “legend rule” checks the full names of legendary permanents. You can control Oath of Gideon and Oath of Chandra at the same time, for example.
1/22/2016 Even if you control a particular Oath, you can cast another of that Oath to take advantage of its enters-the-battlefield ability. It will enter the battlefield, causing its first ability to trigger. You will then choose one to keep, as detailed above, and then its enters-the-battlefield ability will resolve.
My points aren't specific, they're legitimate cases that will happen with this card and who is going to use it. Not some really awfully drawn out scenario to make this card seem worse than Sleight of Hand (Which if it's such a good card, why does it only see play in combo decks in Modern and no where else).
Also, I still think you're missing the entire point of this card as well. You're going to play it turn 1 ideally to find a missing land drop or a threat in either a creature or planeswalker. If you're playing it turn one, the chances are you do not need a card like Abzan Charm and if you do, you probably have other ways of finding them through something like Painful Truths or have other ways of dealing with creatures like any well designed deck. Again, my Collected Company comes back around with that even if you build a deck to take advantage of it, you can miss. With this card, the chances of not finding something relevant is low, however it's not a perfect card filter card, but being Green allows it to be in different decks and those decks already play a different way rather than the way you keep suggesting to make it seem worse than it is.
Am I saying this card is the best out there? No way, however I'm realistic in what this card is trying to do in the decks it is in, much like Ajani, Mentor of Heroes and his second +1 ability, the decks that play him, want those cards to be found anyways so it's for those decks, and Abzan in Standard, and even in Modern G/B/x could play this card and the decks run enough ways to shuffle their decks that even for any reason they wanted something they didn't pick or couldn't pick, they can find it again with fetchlands, etc.
I never compared this card to Sleight of Hand, that's not what I am arguing, I'm arguing the bias in your argument and why it's not good to have.
But you're right, you could easily run this card in Abzan Aggro, I just hope you don't miss that Abzan Charm that you need to take out a big threat or allow you to draw cards. I wouldn't take that chance. I would only play this card in a constructed deck if I knew that the abilities were going to be fully utilized and there was absolutely no downside to playing the card.
So you're saying that playing a card for an ability and also drawing a card is the same as just playing a card for an ability and not drawing a card from it? I don't agree with you. This card does indeed offer card advantage. It sounds like your saying that sleight of hand doesn't give card advantage.
Cheers
The deck that is playing this isn't going to be running a board wipe. Like, realistically think what decks in standard are going to be using this? The ones that run mostly creatures like Abzan and G/R Eldrazi Ramp. If anything this card is closest to Peer Through Depths. Sure it doesn't see five cards, isn't instant speed, but it also isn't two mana and only finds an Instant or Sorcery (which the people who run that card aren't complaining about because the people who run this card are using it to filter and find guess what? An instant or a sorcery card!) This card is extremely good in the decks that want it, which is decks that run off of a high density of creatures and/or planeswalkers.
It's just that your example is almost completely corner case and poor deck design for the people who are going to be running this card, and secondly it isn't really a build around card, it can be slotted into any Abzan Aggro list with little to no ease. Can it miss? Sure, can Collected Company miss in a high density creature list? Absolutely. Last, it's not card advantage, you play a card and get a single card from it, card advantage is using a single card to get two or more cards worth of value out of it like Divination or Kolaghan's Command.