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Uhm....Incase you didn't know, Creeper spawners are not found naturally :D. So you would never run into a problem with a creeper spawner unless...
Are you serious? You're really going to say mobs from hostile spawners dont attack in Vanilla MC? I will literally go on Minecraft, with no mods,...
I made this thread because I think mobs from spawners should act regular, and attack you. When mobs from spawners, just stand there, idle, and...