White Plume Adventurer was eventually banned in Legacy, while many of the common initiative cards like Aarakocra Sneak and Vicious Battlerager were banned in Pauper
With less of a focus on low-cost characters than Amber/Amethyst and fewer heavy hitters than Sapphire/Steel, Emerald/Ruby places a big emphasis on solid mid-range options
In other words, you simply cannot miss with this card, for every card it puts onto the board will help you out one way or another
[30] Command : In the Commander format, each player's commander is put here at the start of the game and returns when it leaves the battlefield
Id recommend reading through the reviews yourself to see if any of these are a good fit for you
they can also be found in traditional foil, nonfoil, textured foil, and foil-etched in Collector Boosters