Errors include holo bleeds, misaligned holo patterns, and holo foil applied to sheets that should have been non-holographic
It works less well with aggressive decks than Predator Dragon, though, but being able to damage a creature every turn is good if you can give it deathtouch
The most likely reasons are if its sacrificed, if its a creature whose toughness is 0 or less, or if its an Aura thats either unattached or attached to something illegal.
Grab the Prize also has certainly been very good in this deck
Aerodactyl Aerodactyl is an ancient Pokemon long thought to be extinct
716.2c: The phrase to gain a Class level means to activate an ability indicated by a class level bar 716.2d: If a rule or effect refers to a permanents level and that permanent doesnt have a level, it is treated as though its level is 1.