That format had also just received a set of tapped artifact dual lands in addition to their established cycle of untapped single color artifact lands
A regular, nonlegendary uncommon can command your forces in Pauper Commander, but thats a different format with different rules
Additionally, the rule of having no more than 4 of the same card is specific to the title of the card
Illustrated by Lars Grant-West Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
I built a deck using both of my new favorite cards for Standard (at the time), here's the deck list: Creatures Sorcery 4x Thoughtseize 4x Damnation 2x Wrath of God Instant 4x Darkness 3x Dawn Charm Enchantment Artifact 3x Claws of Gix Lands 5x Plains 6x Swamp Sideboard 2x Wrath of God 3x Sudden Death 3x Distress I could gain huge card advantage with the Plans and lock down my opponent using Maralen to slowly drain their lives
Top black common: Annihilating Glare The most popular common card in this set is the black card Annihilating Glare, which has an average pick position of 2.38