Given that The Walking Dead Secret Lair doesnt include any cards that were ever Standard-legal you cant play them in formats like Pioneer or Modern, but you can play them in Legacy and Commander
While they are only temporary fixing, those 2 charge counters are often enough to tide you over until you find play more permanent sources of mana fixing in the game
If you want to be a more straightforward attacking deck, there are a lot of angels that have lifelink and powerful abilities
Blade of Selves (62k) has a FEA from CLB, Flail (32k) has an etched foil thats over $20, Deathrender (6k) is worth a couple bucks, Darksteel Plate (72k) also has a $20+ etched version, and Whispersilk Cloak (168k) has the special LCI printing pushing $10
PSA 10 grading means that the price (team) rockets up to $1099, with the last sale according to Pricecharting.com