Blue creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {U} for each creature chosen this way. If the player does, untap those creatures.
Near Mint - £0.60
Lightly Played - £0.50
Moderately Played - £0.40
Heavily Played - £0.30
Damaged - £0.20
Near Mint Non English - £0.60
Lightly Played Non English - £0.50
Moderately Played Non English - £0.40
Heavily Played Non English - £0.30
Damaged Non English - £0.20