This is Gentle Waters decorating the back of two Doyouthinkhesaurus.
Over ivory works so well because the blend is so fine you don't get that awful black streaking
Over effetre grey see how it creates those darling little puddles?
Over white and over clear, it does interesting things over clear, if you lag it on it just looks like clear blue but if you use sparingly you get a rather clever is it clear is it blue flip flop effect. Doesn't much like being swirled but loves to puddle.