Xasnu
From superman.nu: Supermanica
Xasnu
A diabolical "plant intelligence" from the far-distant planet Zelm, the advance guard of a race of sinister "plant aliens" bent on conquering the Earth that seizes control of the body of Perry White (in the persona of Masterman) in July 1961, only to be destroyed finally by a chunk of White Kryptonite hurled at it by Supergirl (Act No. 278: "The Super Powers of Perry White!").
