Lose Calm

Oracle Text

Gain control of target creature until end of turn. Untap that creature. It gains haste and menace until end of turn. (A creature with menace can't be blocked except by two or more creatures.)

Card Rulings

2/25/2015 Lose Calm can target any creature, including one that’s untapped or one you already control.
2/25/2015 Gaining control of a creature doesn’t cause you to gain control of any Auras or Equipment attached to it.