Whiblex, Gilded Enigma

Flying; vigilance
At the beginning of each end step, create X 1/1
white and blue Gold Sphere artifact creature
tokens with flying, where X is the number of noncreature spells you've cast this turn.
Whenever you cast a white or blue noncreature
spell, detain up to X target nonland permanents,
where X is that spell's converted mana cost.