Sai of the Shinobi 
Artifact — Equipment
$0.28 #15567 0.20 14.3 years
Equipped creature gets +1/+1.
Whenever a creature you control enters, you may attach this Equipment to it.
Equip 
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Stormrider Rig100%
$0.18↓#20942↓0.2511.4 years↓
"Whenever a creature you control enters, you may attach this Equipment to it."
+2 more matching lines
Ronin Warclub100%
$0.36↑#20458↓0.2221.6 years↑
"Whenever a creature you control enters, attach this Equipment to that creature."
+1 more matching line
Doc Ock's Tentacles90%
$0.40↑#8431↑0.39↑1.0 years↓
"Whenever a creature you control with mana value 5 or greater enters, you may attach this Equipment to it."
+1 more matching line
Hero's Blade90%
$0.16↓#1871↑0.1511.6 years↓
"Whenever a legendary creature you control enters, you may attach this Equipment to it."
+1 more matching line
Dredging Claw88%
$0.12↓#23199↓0.06↓3.8 years↓
"Whenever a creature enters from your graveyard, you may attach this Equipment to it."
Bespoke Battlegarb88%
$0.13↓#20675↓0.293.0 years↓
"At the beginning of combat on your turn, if two or more nonland permanents entered the battlefield under your control this turn, attach this Equipment to up to one target creature you control."
+2 more matching lines
Hylderblade86%
$0.15↓#158250.02↓1.1 years↓
"Equipped creature gets +3/+1."
Obsidian Battle-Axe84%
$0.32↑#136570.00↓18.6 years↑
"Whenever a Warrior creature enters, you may attach this Equipment to it."
+2 more matching lines
Inventor's Goggles84%
$0.12↓#23840↓0.00↓9.9 years↓
"Whenever an Artificer you control enters, you may attach this Equipment to it."
+2 more matching lines
Vulshok Splitter83%
$0.18↓#173010.00↓3.6 years↓
"Equipped creature gets +2/+0."
Cloak and Dagger82%
$1.25↑#10080↑0.2718.6 years↑
"Whenever a Rogue creature enters, you may attach this Equipment to it."
Quintessential Katana82%
$0.21↓#145250.00↓0.5 years↓
"Whenever a Ninja you control enters, you may attach this Equipment to it."
+1 more matching line
Barbed Spike82%
$0.18↓#153390.31↑5.2 years↓
"Equipped creature gets +1/+0."
+1 more matching line
Valkyrie's Sword82%
$0.21↓#20638↓0.37↑5.6 years↓
"Equipped creature gets +2/+1."
Sokka and Suki82%
$0.89↑#155760.00↓0.8 years↓
"Whenever an Equipment you control enters, create a 1/1 white Ally creature token."
Attended Socialite81%
$0.07↓#23744↓0.05↓4.4 years↓
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Loporrit Scout81%
$0.14↓#19003↓0.31↑1.2 years↓
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Beast-Kin Ranger81%
$0.09↓#152530.151.8 years↓
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Crossroads Watcher81%
$0.11↓#19495↓0.00↓0.6 years↓
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Mutant Town Musicians81%
$0.08↓#25590↓0.00↓0.5 years↓
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."