I tried to make
Oracle version of Astral cards. Barring precise details of random choice, this could be a start:
Aswan Jaguar1GG
Creature - Cat
2/2
As
Aswan Jaguar enters the battlefield, choose a creature type at random from among all creature types that a creature card in target opponent's decklist has.
GG, T: Destroy target creature with the chosen type. It can't be regenerated.
Call from the Grave
2B
Sorcery
Choose a player at random. Choose a creature card in that player's graveyard at random and put it onto the battlefield under your control. Call from the Grave deals damage equal to that creature card's converted mana cost to you.
Faerie Dragon
2GG
Creature - Dragon
1/3
Flying
1GG: Perform a random action from the following list:
A creature chosen at random gains trample and gets +
X/+0 until end of turn, where
X is its power. At the beginning of the next end step, destroy that creature if it attacked this turn.
You may tap or untap an artifact, creature, or land chosen at random.
If a creature chosen at random has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-
X until end of turn, where
X is its toughness minus 1.
A spell or permanent chosen at random becomes green. (Mana symbols on that permanent remain unchanged.)
A spell or permanent chosen at random becomes white. (Mana symbols on that permanent remain unchanged.)
A spell or permanent chosen at random becomes red. (Mana symbols on that permanent remain unchanged.)
Faerie Dragon deals 3 damage to a creature or player chosen at random.
A creature chosen at random gains flying until end of turn.
A creature chosen at random gets +3/+3 until end of turn.
A creature chosen at random gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)
A spell or permanent chosen at random becomes black. (Mana symbols on that permanent remain unchanged.)
A spell or permanent chosen at random becomes blue. (Mana symbols on that permanent remain unchanged.)
A creature chosen at random can't be regenerated this turn.
If a creature chosen at random has power 2 or less, it is unblockable this turn.
A creature chosen at random gets -2/-0 until end of turn.
Return a creature chosen at random to its owner's hand.
Faerie Dragon deals 1 damage to a creature or player chosen at random.
A creature other than Faerie Dragon chosen at random becomes 0/2 until end of turn.
Exile a creature chosen at random. Its controller gains life equal to its power.
Randomly distribute
X -0/-1 counters among a random number of creatures chosen at random.
Gem Bazaar
Land
As Gem Bazaar enters the battlefield, choose a color at random.
T: Add one mana of the last chosen color to your mana pool. Then choose a color at random.
Goblin Polka Band
RR
Creature - Goblin
1/1
2, T: Choose any number of target creatures at random. Tap those creatures. Goblins tapped this way do not untap during their controllers' next untap steps. This ability costs R more to activate for each target.
Necropolis of Azar
2BB
Enchantment
Whenever a nonblack creature is put into a graveyard from the battlefield, put a husk counter on
Necropolis of Azar.
5,
Remove a husk counter from
Necropolis of Azar: Put a
X/Y black Spawn creature token named Spawn of Azar with swampwalk onto the battlefield, where
X and Y are numbers chosen at random from 1 to 3.
Orcish Catapult
XRR
Instant
Randomly distribute
X -0/-1 counters among a random number of random target creatures.
Pandora's Box
5
Artifact
3, T: Choose a creature card at random from all players' decklists. For each player, flip a coin. If the flip ends up heads, put a token that's a copy of that creature card onto the battlefield under that player's control.
Power Struggle
2UUU
Enchantment
At the beginning of each player's upkeep, exchange control of a target artifact, creature or land that player controls, chosen at random, and a random target permanent that shares one of those types with it a player who is his or her opponent chosen at random.
Prismatic Dragon
2WW
Creature - Dragon
2/3
Flying
At the beginning of your upkeep, Prismatic Dragon becomes a color chosen at random. (This effect lasts indefinitely.)
2: Prismatic Dragon becomes a color chosen at random. (This effect lasts indefinitely.)
Rainbow Knights
WW
Creature - Human Knight
2/1
As Rainbow Knights enters the battlefield, it gains protection from a color chosen at random. (This effect lasts indefinitely.)
1: Rainbow Knights gains first strike until end of turn.
WW: Rainbow Knights gets +
X/+0 until end of turn, where
X is a number chosen randomly from 0 to 2.
Whimsy
XUU
Sorcery
Perform
X random actions from the following list:
Return a permanent that isn't enchanted chosen at random to its owner's hand.
Untap a artifact, creature or land chosen at random.
Tap a artifact, creature or land chosen at random.
Whimsy deals 4 damage to a creature or player chosen at random.
A player chosen at random draws three cards.
Destroy an artifact chosen at random. It can't be regenerated. That artifact's controller gains life equal to its converted mana cost.
Destroy an artifact or enchantment chosen at random.
A player chosen at random gains 3 life.
Prevent the next 3 damage that would be dealt to a creature or player chosen at random this turn.
Destroy a creature or land chosen at random. It can't be regenerated.
A player chosen at random puts the top two cards of his or her library into his or her graveyard.
Put a 1/1 colorless Insect artifact creature token with flying named Wasp onto the battlefield. (It can't be blocked except by creatures with flying or reach.)
Destroy all artifacts, creatures and enchantments.
Flip a coin. If you lose the flip, Whimsy deals 5 damage to you. If you win the flip, put a 5/5 colorless Djinn artifact creature token with flying onto the battlefield.
Choose a creature card at random from all players' decklists. For each player, flip a coin. If the flip ends up heads, put a token that's a copy of that creature card onto the battlefield under that player's control.
A player chosen at random discards a card.
Prevent all combat damage that would be dealt this turn.
Draw a card and reveal it. If it isn't a land card, discard it.
In other news, Masters Edition 4 is on Gatherer.