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So certainly use them in whichever manner works best for you, but dont feel like you have to be beholden to them

It is recommended that you use no more than 60 cards.These cards span various types, notably including land cards that serve the essential function of generating mana, the vital resource required for casting spells

Each of these cards captures the history of Captain America, different moments and different eras of the characters, and, of course, they honor the shield

Bighorner Rancher's second ability is a mana ability

It's dependent on having a beefy creature with high toughness, but that's basically a non-issue in green