Unstable Experiment 
Instant
$0.23 #7858 0.42 1.1 years
Target player draws a card, then up to one target creature you control connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)
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Mob Lookout80%
$0.09↓#15371↓0.00↓1.1 years
"When this creature enters, target creature you control connives."
Combat Tutorial80%
$0.23#5169↑0.12↓1.4 years
"Target player draws two cards. Put a +1/+1 counter on up to one target creature you control."
Catalog79%
$0.07↓#17013↓0.00↓28.0 years↑
"Draw two cards, then discard a card."
Leader, Super-Genius78%
$0.34↑#82870.13↓0.3 years
"If a creature you control would connive, instead you draw a card, then that creature connives."
Obscura Confluence78%
$0.33↑#17803↓0.29↓4.5 years↑
"• Target creature connives."
Trickster's Stratagem77%
$0.12↓#21099↓0.23↓0.3 years
"The owner of target creature an opponent controls puts it into their library second from the top or on the bottom. Then up to one target creature you control connives."
Whirlwind Technique76%
$0.18↓#12103↓0.22↓0.9 years
"Target player draws two cards, then discards a card."
Snow Day75%
$0.14↓#24656↓0.15↓5.5 years↑
"Draw two cards, then discard a card."
Psionic Snoop74%
$0.10↓#26022↓0.27↓4.5 years↑
"When this creature enters, it connives."
Red Room Recruit74%
$0.13↓#19330↓0.12↓0.3 years
"When this creature enters, it connives."
Raffine's Informant74%
$0.25↑#21046↓0.00↓4.5 years↑
"When this creature enters, it connives."
Depth Defiler74%
$0.16↓#19316↓0.17↓2.3 years↑
"• Target player draws two cards, then discards a card."
Echo Inspector74%
$0.06↓#24055↓0.00↓4.5 years↑
"When this creature enters, it connives."
Revel Ruiner74%
$0.04↓#25192↓0.00↓4.5 years↑
"When this creature enters, it connives."
Rousing Read72%
$0.14↓#19624↓0.00↓6.3 years↑
"When this Aura enters, draw two cards, then discard a card."
Wistful Thinking71%
$0.10↓#24836↓0.22↓19.7 years↑
"Target player draws two cards, then discards four cards."
Huddle Up71%
$0.11↓#22989↓0.16↓8.4 years↑
"Two target players each draw a card."
Change of Plans71%
$12.35↑#70530.504.5 years↑
"Each of X target creatures you control connive. You may have any number of them phase out."
Cost of Brilliance70%
$0.18↓#12332↓0.04↓0.5 years
"Target player draws two cards and loses 2 life. Put a +1/+1 counter on up to one target creature."
Calamitous Tide70%
$0.13↓#16013↓0.00↓2.2 years↑
"Return up to two target creatures to their owners' hands. Draw two cards, then discard a card."