When youve got that many possible choices for artwork and styles, it reduces the impact of these apparent special editions
While it may be tempting to create exact replicas of official cards, doing so is a clear violation of copyright laws and can lead to legal consequences
Board wipes like Austere Command, Cleansing Nova, Damnation, Toxic Deluge, Cyclonic Rift, Rivers Rebuke, Blasphemous Act, Vandalblast, and All is Dust are almost always worth having on hand in some capacity
Flanking means "Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn." If a creature gains flanking during combat, that has no effect on any creature already blocking it