Enchant creature
Enchanted creature gets +1/+2 as long as it's white.
Enchanted creature has shroud as long as its controller controls another creature. (It can't be the target of spells or abilities.)
A keyword ability that defines what an Aura spell can target and what an Aura permanent can be attached to. See rule 303, “Enchantments,” and rule 702.5, “Enchant.”
