Chromatic Armor
{1}{W}{U}
Enchantment -- Aura
Enchant creature
As ~this~ enters, choose a color.
~this~ enters with a sleight counter on it.
Prevent all damage that would be dealt to enchanted creature by sources of the last chosen color.
{X}: Put a sleight counter on ~this~ and choose a color. X is the number of sleight counters on ~this~.