Shield of the Righteous 

Artifact — Equipment
Equipped creature gets +0/+2 and has vigilance.
Whenever equipped creature blocks a creature, that creature doesn't untap during its controller's next untap step.
Equip {2}
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Cards that do something similar expected a card that isn't here?
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Shining Armor 100%
$0.15#20305
"Equipped creature gets +0/+2 and has vigilance."
+1 more matching line
Captain America's Shield 100%
$1.79#10022
"Equipped creature gets +0/+8 and has vigilance."
+1 more matching line
Accorder's Shield 99%
$0.15#6638
"Equipped creature gets +0/+3 and has vigilance."
+1 more matching line
Cathar's Shield 99%
$0.25#7382
"Equipped creature gets +0/+3 and has vigilance."
+1 more matching line
Avacyn's Collar 99%
$0.30#19079
"Equipped creature gets +1/+0 and has vigilance."
+1 more matching line
True-Faith Censer 99%
$0.06#20471
"Equipped creature gets +1/+1 and has vigilance."
+1 more matching line
Halvar, God of Battle // Sword of the Realms 94%
$26.98#2379
"Equipped creature gets +2/+0 and has vigilance."
The Spear of Bashenga 92%
$0.34#20658
"Equipped creature gets +2/+2 and has vigilance."
+1 more matching line
Avarice Amulet 88%
$0.26#13276
"Equipped creature gets +2/+0 and has vigilance and "At the beginning of your upkeep, draw a card.""
+1 more matching line
Cleric of Chill Depths 86%
$0.17#23113
"Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step."
Wall of Frost 86%
$0.29#4738
"Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step."
Labyrinth Minotaur 86%
#30016
"Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step."
Team Pennant 86%
$0.18#13778
"Equipped creature gets +1/+1 and has vigilance and trample."
+1 more matching line