magic immune means it is invulrable / undamagedable with spells.
EVEN V3 , RICHOCHET GEMS , BURST GEMS , LICH KING 'S KING ICE , LICK KING 'S ULTI , MEAT CARRIER 'S FIRE AND MORE , ONLY TECHIES CAN HURT MAGIC IMMUNED BUILDINGS OR UNITS.
magic immune is invulrable to v3 and that is y i like to build end game towers at the blink place nor gold mines.