Angelic Benediction: Adhere to the 'may' in the card text.

The card text says "you may tap target creature", but the implementation
would always result in tapping the  target creature. This can make a
difference if only Angelic Benediction and Guardian Lions are on the
battlefield, and only Guardian Lions attacks, yet you want to keep both
creatures untapped (eg. for blocking potential opponent's creatures with
Haste).