Assault Suit 
Artifact — Equipment
$0.22 #4138 0.30 11.8 years
Equipped creature gets +2/+2, has haste, can't attack you or planeswalkers you control, and can't be sacrificed.
At the beginning of each opponent's upkeep, you may have that player gain control of equipped creature until end of turn. If you do, untap it.
Equip 
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Cards similar to Assault Suit expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Alexios, Deimos of Kosmos76%
$0.36↑#1269↑0.64↑2.2 years↓
"At the beginning of each player's upkeep, that player gains control of this card, untaps it, and puts a +1/+1 counter on it. It gains haste until end of turn."
+1 more matching line
Slicer, Hired Muscle // Slicer, High-Speed Antagonist72%
$9.32↑#34110.96↑3.8 years↓
"At the beginning of each opponent's upkeep, you may have that player gain control of this card until end of turn. If you do, untap this card, goad it, and it can't be sacrificed this turn. If you don't, convert it."