Gargoyle Sentinel 
Artifact Creature — Gargoyle
Defender (This creature can't attack.)
{3}: Until end of turn, this creature loses defender and gains flying.
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Cards that do something similar expected a card that isn't here?
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Manor Gargoyle 96%
$0.20#21525
"{1}: Until end of turn, this creature loses defender and gains flying."
+1 more matching line
Ribbon Snake 80%
$0.06#30769
"{2}: This creature loses flying until end of turn. Any player may activate this ability."