The upkeep cost is tough, and makes the activated ability neglectable, as you probably don't have that much red mana in most cases
Whether you're a beginner or looking to expand your collection, this quiz will show you the best choice
I wrote up a review of the face commanders some time ago
The Ruby/Steel deck uses two strong ink colors and has a fun theme that rewards players who are up for a scrap
Beyond that, the boring staples: Smothering Tithe, Vampiric Tutor, Demonic Tutor, Animate Dead, blahblah
Spending at least $25, or taking place in any of the Lorcana events, will earn you one of three promo cards each day: Four Dozen Eggs