Because Diamondrock demands it!
One of Young Tom’s absolute favorite comics stories was the 1977 Justice League/Justice Society/Legion of Super-Heroes team-up. Here, Saturn Girl prepares to take out Hal Jordan through the power of THINKING!
Update: Yes, SallyP, Saturn Girl’s THINKING pays off!
[From Justice League of America #148, “Crisis In Triplicate!”, November 1977; written by Paul Levitz & Martin Pasko, pencilled by Dick Dillin, inked by Frank McLaughlin.]