This ThunderCats t-shirt features an image of the Lord of the ThunderCats, Lion-O. Lion-O was a member of the ThunderCats flagship that made its way to Third Earth. As the leader of the ThunderCats, Lion-O held the Sword of Omens. When threatened by Mumm-Ra and his Mutants, Lion-O would summon the other ThunderCats by pointing the Sword of Omens towards the sky and shouting the battle cry, "Thunder, Thunder, Thunder, ThunderCats HO!!!"