Spain's socialist government legalizes 500,000 illegals via royal decree. Migrants mostly from Colombia, Peru, Honduras. Undocumented numbers rose eightfold to 840,000 since 2017. Policy requires 5 months residency and no criminal record. Grants one-year permits renewable. Applications open April to June 2026. Government claims economic need for 300,000 migrants yearly. Sanchez calls migration source of wealth and prosperity. Opposition warns of pull effect overwhelming services. Vox says policy attacks Spanish identity and plans court challenge.