As a 2/2 with flash, its not out of the question as a main-deck card, especially if you get creative in building around it Despite the name, Containment Priests powers are not strictly defensive
Some professional printers offer borderless printing, but even these typically clip 1-2mm from edges
The Seal of Orichalcos grants the player a ton of power, some of which are: the ability to move monsters into the spell and trap zone that then can't be attacked until the front row is destroyed, the ability to summon more than 5 monsters at once, a buff to each monster on their side of the field that grans them 500 attack points, and The Seal of Orichalcos can't be destroyed by card effects, also the loser of the duel loses their soul
Said FTK led to the OCG-side Limitation of Divine Wind of Mist Valley
Theres not much more you can ask for in a massive creature
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