Authority of the Consuls is in the deck as a cheap enchantment that will give you life for creatures entering the battlefield under an opponents control
If a card states this restriction, card with the same name can be activated again that turn, even if but only if, its activation is negated
Rarity refers to how likely the card is to be opened in a booster pack
$0.99 Oko, the Trickster (Planeswalker Deck) Throne of Eldraine $1.49 Tamiyo, Field Researcher (0100 - Borderless) Bloomburrow Commander Decks Variants $3.99 Brokers Ascendancy Streets of New Capenna $0.99 Dovin Baan Kaladesh $0.35 The Wanderer War of the Spark $0.99 Contentious Plan War of the Spark $2.49 Chromatic Lantern Teenage Mutant Ninja Turtles Eternal-Legal $0.49 Tamiyo, Collector of Tales Mystery Booster/The List $1.99 Kiora, the Crashing Wave (Foil) Duel Decks: Elspeth Vs
The Wandering Emperor, pictured above, was one of them
I think its certainly a disruption (in the industry)