Choose two target creatures. Untap them. Put two +1/+1 counters on each of them. They gain vigilance (Attacking doesn't cause this creature to tap.), indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.), and haste (This creature can attack, and as soon as it comes under your control.) until end of turn. After this main phase, there is an additional combat phase. Only the chosen creatures can attack during that combat phase.