mtg mirrodin besieged card Burn the Impure [Mirrodin Besieged] draw a card 1 X Mirrodin Besieged 057/254

There's also Grim Guardian, who's constellation ability circumvents the need for combat entirely

Theres reason for that too, as most of them are pretty bad

Another important part of a 5-color mana base is lands that allow you to tap for any color

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Link is the focal point here, but the magentas and yellows are colors very rarely seen on Magic cards in such intensity, and I really like it