En effet malheureusement cela ne fonctionne pas.
112.3d Static abilities are written as statements. They’re simply true. Static abilities create continuous effects which are active while the permanent with the ability is on the battlefield and has the ability, or while the object with the ability is in the appropriate zone.
Pour que l'effet perdure même si
Ingérence du mage quitte le champ de bataille, il aurait fallut qu'il soit écrit : "
until end of game, target named card can't be cast.
101. The Magic Golden Rules
101.1. Whenever a card’s text directly contradicts these rules, the card takes precedence. The card overrides only the rule that applies to that specific situation.