The Half-Elf kin talent Psychic Power adds an extra WP to any WP you spend casting a spell. Obscure Magic lets you hide a spell from detection by spending an extra WP on it (without adding to the power level).
Can the bonus WP from Psychic Power be used to cast a spell with Obscure Magic, instead of adding to the power level? Or does a half-elf still need to spend 2 WP minimum to cast a spell with Obscure Magic?