nice deck after unban of Bitterblossom ;) +1

+1 Always love seeing the faeries played and the synergy with this one is great. Love Bitterblossom and you can tell everyone else does too since it has at least tripled in price since the unbanning.

This isn't really Budget anymore

That is true, BB inflated the price a lot, but I have outlined in description how easy it is for it to become budget. I like to keep the optimal build up, and people can just scale down to their budgets.

add 4 Oona's Prowler and drop the 4 Nightshade Stinger trust me it will help he can be a big threat in this deck

Oona's prowler has consistently been the weakest creature in the deck. I have ultimately cut them completely after various iterations of the deck, because they ultimately cost too much. the 8 1-drops in the deck are currently there to enable t2 prowl. Which, after cutting the morsel theft is not as relevant. I will think about it, thanks!

-4 Nightshade Stinger +3 Oona's Prowler

(I have currently 61 cards)

Deathcult Rogue is decent, also Dunerider Outlaw is good sideboard, Guul Draz Vampire is pretty good, same with Marsh Flitter . Hope this helps! +1

All of these have been considered before, and have some uses, but end up as not a good fit for the deck:

deathcult is unblockable, which is cool, but it is also 3 mana. The only thing that costs three mana in the deck is earwig squad, but it tends to end games. deathcult just attacks for 2.

Dunerider is a good SB tech vs green creatures (aka Tarmogoyf and nothing else really), and also green creatures tend to have trample which is not stopped by protection. However, it has a decent synergy with Blackguard, so it becomes a good meta choice.

The vampire has no place in the deck. Being a 1/1 vanilla for the greater part of the game does not justify having a black Delver of secrets on the field for a couple of turns in the late game.

Marsh flitter originally had space in the deck, but the mana cost on this guy is ridiculous. As the average cmc of the deck was reduced, it soon became that 4 mana for 3 power that is split up into 3 parts is quite a lot. Sure, it can be lower with Frogtosser.

Thanks for the comments and the plus 1, really appreciated the suggestions. Keep'em coming!

I not only appreciate what you've done here, I love it! This deck is grimy and it cheats everything into play. I've practiced it some online (sans bitter blossom and thoughtseize) and it's a lot of fun. I was seriously eyeing Merfolk decks and wondering if Modern was worth the entry. This deck gives the experience of a tribal/tempo (aggro?) deck at the cost of just one non-core card in a Merfolk deck. It's ridiculously awesome for its price.

My only suggestions would be a possible 1-2 of Bojuka Bog if graveyard abuse is heavy in your area. This slows the deck down and shouldn't be standard fare, but it's an option to add graveyard hate if you were set on keeping other cards in your sideboard.

I'm not a big fan of Faerie Macabre but she's good synergy with limited removal. Definitely waiting to give her a fair trial before I swap her for something more specialized like Grafdigger's Cage and/or Pithing Needle .

Other than that, you'd need to splash other colors for any other kind of benefit, or find some artifacts or changelings you'd be willing to use. Dolmen Gate is decent if you expect to face opponents who can block you. Infiltration Lens is a 'meh' way to add threat to creatures who can be blocked.

How about Morsel Theft ? I have that in my Dimir Rogues deck for a touch of life gain and card advantage.

Most times, you will need the lifegain and CA from it, hence it is in the SB vs aggresive decks.

Deathcult Rogue would be great in this deck, it is usually unblockable if the opponent has no rogues or changelings in their creature ranks =)

3 mana is way too expensive (there is just 4 copies of a card that costs 3), plus unblockable is not as cool as fear and flying.

Have you considered adding a Cabal Coffers ? Your current mana base seems kinda dull.

Why would I want cabal coffers in this deck? There are 4 cards total that cost 3 mana, everything else is two or less. Not to mention, coffers is not legal in modern.