Sera, Orzhov Guildmage

{1}{w}{b}: Sera, Orzhov Guildmage deals 1 damage to any target.
{1}{w}{w}{b}{b}: Sera Orzhov Guildmage deals 4 damage to any target.
{10}{w}{w}{w}{w}{b}{b}{b}{b}: Sera, Orzhov Guildmage deals
20 damage to any target.