Here's some choices that may be interesting:

Commander Eesha
2WW
Creature – Bird Soldier Legend
Flying, Protection from Creatures
“War glides on the simplest updrafts while peace struggles against hurricane winds. It is the way of the world. It must change.”
2/4
Rare
Rebecca Guay
9/143

Pro: creatures. Ok...
----

Flash of Insight
X1U
Instant
Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library.
Flashback: 1U, remove X blue cards in your graveyard from you game.
U
Ben Thompson
40/143

Super Impulse? I don't think so, still interesting.
----

Grip of Amnesia
1U
Instant
Counter target spell unless its controller removes his or her graveyard from the game. Draw a card.
"Would you abandon your past to save your future?"
-Ambassador Laquatus
Common
Bradley Williams
41/143

Not too bad, is it? Probably not as a 4-of, but it will see play, I'm sure.
----

Laquatus’s Disdain
1U
Instant
Counter target spell played from the graveyard.
Draw a card.
“The first time was amusing, but now you’re getting tiresome.”
U
Pete Venters
44/143

Also funny. The graveyard theme makes some countermeasures for will. This won't be played anyway much.
----

Spelljack
3UUU
Instant
Counter target spell. If it’s countered this way, remove it from the game instead of putting it into its owners graveyard. As long as it remains removed from the game, you may play it as though it were in your hand without paying its mana cost. If it has X in its mana cost, X is 0.
Rare
Pete Venters
51/143

Too expensive, but nice.
----

Grave Consequences
1B
Instant
Each player may remove any number of cards in his or her graveyard from the game. Then each player loses 1 life or each card in his or her graveyard. Draw a card.
"You call that a nightmare?"
-Braids, dementia summoner
Uncommon
Tim Hildebrandt
67/143

A hard punishment.
----

Crush of Wurms
6GGG
Sorcery
Put 3 6/6 green Wurm tokens into play.
Flashback: 9GGG
Rare
Christopher Moeller
110/143

That's cool!
----

Epic Struggle
2GG
Enchantment
At the beginning of your upkeep, if you control 20 or more creatures, you win he game.
“If out foes will not listen to words, perhaps hooves and claws will make them take notice.” – Seton, centaur druid
Rare
Greg & Tim Hildebrandt
112/143

That's ridiculous.
----

Ernham Djinn
3G
Creature – Djinn
At the beginning of your upkeep, target non-Wall creature an opponent controls gains Forestwalk until your next upkeep.
He provides a safe path to nowhere.
4/5
Rare
Greg Staples
113/143

He's back! He's back! So what?
----

Hunting Grounds
GW
Enchantment
Threshold – Whenever an opponent plays a spell, you may put a creature card from your hand into play.
In the heavy hush of Krosa, drawing on mana is like ringing a dinner bell.
Rare
Mark Brill
138/143

Interesting! A Nightmare to control?
----

Mirari’s Wake
3GW
Enchantment
Creatures you control get +1/+1.
Whenever you tap a land for mana, add one mana to your mana pool of any type that land produced.
The land drank power from the Mirari as though it has thirsted for it forever.
Rare
David Martin
139/143

We'll see...


Some choices. Of course, Seedtime and the Wishes were already discussed.

Dozer