Security Bypass 
Enchantment — Aura
$0.29 #6079 0.50 4.4 years
Enchant creature
As long as enchanted creature is attacking alone, it can't be blocked.
Enchanted creature has "Whenever this creature deals combat damage to a player, it connives." (Its controller draws a card, then discards a card. If they discarded a nonland card, they put a +1/+1 counter on this creature.)
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Cards similar to Security Bypass expected a card that isn't here?
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Mask of the Schemer86%
$1.48↑#11411↓0.32↓4.4 years
"Whenever equipped creature deals combat damage to a player, it connives X, where X is the amount of damage it dealt to that player."
Gutter Skulker // Gutter Shortcut80%
$0.04↓#21938↓0.00↓4.8 years
"Enchanted creature can't be blocked as long as it's attacking alone."
Namor, Scourge of the Seas76%
$0.77↑#18854↓0.00↓0.2 years↓
"At the beginning of combat on your turn, target creature you control connives."
Atlantean Skirmisher75%
$0.28↓#24942↓0.00↓0.2 years↓
"Whenever this creature attacks, it connives."
Doc Ock's Henchmen75%
$0.17↓#13562↓0.25↓1.0 years↓
"Whenever this creature attacks, it connives."
Spirit Mantle75%
$0.37↑#1704↑0.37↓15.1 years↑
"Enchant creature"
Holy Mantle75%
$0.30↑#8757↓0.33↓13.6 years↑
"Enchant creature"
Leader, Super-Genius74%
$0.39↑#9379↓0.00↓0.2 years↓
"At the beginning of combat on your turn, target creature you control connives."
Kamiz, Obscura Oculus74%
$0.35↑#7859↓0.32↓4.4 years
"Whenever you attack, target attacking creature can't be blocked this turn. It connives. Then choose another attacking creature with lesser power. That creature gains double strike until end of turn."
Daily Regimen74%
$0.09↓#22347↓0.00↓18.6 years↑
"Enchant creature"
Clammy Prowler74%
$0.20↓#11382↓0.08↓1.9 years↓
"Whenever this creature attacks, another target attacking creature can't be blocked this turn."
Phase Dolphin73%
$0.13↓#21227↓0.14↓6.4 years↑
"Whenever this creature attacks, another target attacking creature can't be blocked this turn."
Baron Strucker, HYDRA Overlord73%
$0.19↓#8776↓0.00↓0.2 years↓
"Whenever another Villain you control enters, you may have it connive. Do this only once each turn."
Trygon Prime73%
$0.41↑#11870↓0.20↓3.9 years
"Whenever this creature attacks, put a +1/+1 counter on it and a +1/+1 counter on up to one other target attacking creature. That creature can't be blocked this turn."
Cloak of Mists72%
$0.38↑#11025↓0.18↓27.9 years↑
"Enchanted creature can't be blocked."
Prowler, Clawed Thief72%
$0.17↓#7971↓0.27↓1.0 years↓
"Whenever another Villain you control enters, this card connives."
Scurrilous Sentry72%
$0.13↓#16093↓0.00↓2.2 years↓
"Whenever this creature enters or attacks, it connives."
Raffine, Scheming Seer72%
$2.43↑#48880.36↓4.4 years
"Whenever you attack, target attacking creature connives X, where X is the number of attacking creatures."
Locke Cole72%
$0.20↓#11054↓0.29↓1.2 years↓
"Whenever this card deals combat damage to a player, draw a card, then discard a card."
Swordsman, Sharp Scoundrel72%
$0.18↓#21010↓0.00↓0.2 years↓
"Whenever an equipped creature you control attacks, it connives."