Haste

Target creature gains +0/+1 and Haste (can Attack the round it enters the battlefield). Additionally, the creature gains one of the following abilities each round, chosen as an Instant: Double Strike, Trample, or Vigilance. This spell lasts for 3 rounds.
The round after this spell ends, the creature is Tapped and cannot take any actions.
"Hurry up and wait." - Army maxim