When I was putting these cards together to scan I thought of Captain Planet. I don't know why, but that line "With your powers combined" just popped in my head when I connected them all together.
I could have very easily gone with the Voltron "Activate Interlock. Dynotherms Connected" too which would have been much cooler than Captain Planet.
Anyway, I grabbed this group of Pirates Luminous Triumvrate along with some base cards and inserts for $19 delivered. I've seen some of the individual cards sell for close to that amount.
What I like most about these is that the three players are all wearing the same uniform. Unfortunately, Topps didn't do that with all teams. The Royals, Mets, Marlins, Nationals, Cubs all have mixed home and road jerseys for their respective players. I believe the Pirates and Cardinals are the only teams to feature players all wearing the same jersey for team sets.