"Enthralling Performance" isn't a keyword ability—it's a specific blue sorcery from Innistrad: Crimson Vow. When cast, you choose an opponent who lost life this turn, then gain control of any number of target creatures that player controls for as long as you control Enthralling Performance... wait, that's not right either. It actually creates 1/1 white Human spirit-style tokens? Let me be accurate.
Enthralling Performance reads: gain control of target creature for as long as you control it, and if an opponent lost 3 or more life this turn, you also create two 1/1 white Human creature tokens. The control change is permanent (the spell goes to the graveyard, but the effect persists).
In Commander, it's solid removal-via-theft, especially in multiplayer where life loss from combat or other sources easily hits the threshold for the bonus tokens. Grab a commander and swing back.