#OnThisDay in 1972 #Etrigan debuted in #TheDemon #comics #1 #immortal #rhyming #PrinceValiant #cosplay-inspired #rogue #BoundByHisHalfBrother #Merlin to #demonologist #JasonBlood rich #DocSavage-type #supportCast #JackKirby’s scratch @dcofficial.bsky.social #early70sHorror itch after his #4thWorld