The Open Beta release of Magic Arena the games online version in September of 2018 has made playing a lot cheaper
They will always include eight cards: five commons, two uncommons, and one rare or mythic rare card
his 5 power is pretty easy to boost up to get to the 3-hit mark (7 power across three hits = 21 lethal commander damage), and because of the sheer amount of Auras we'll get on him it's not hard to get to the 2-hit mark (11 power)
Cards like Avacyn, Angel of Hope and Throne of Eldraine are too much to expect from such a cheap product, but there are many angel staples like Lyra Dawnbringer, Starnheim Aspirant, and Sephara, Sky's Blade that would be reasonable inclusions
What makes Kemba shine is the mix of going wide with tokens and tall as a Voltron deck, forcing opponents to deal with threats from both angles