Invasion of Kylem // Valor's Reach Tag Team (March of the Machine 235) - Uncommon Magic: The Gathering Card

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When this Siege enters, up to two target creatures each get +2/+0 and gain vigilance and haste until end of turn.