Versatile Mage: Summon Doraemon at the Beginning

Traveling to the world of a full-time mage, the summoned beast turned out to be Doraemon? Although it has no combat effectiveness, it has a four-dimensional pocket! Magic Encyclopedia: A blank magic book. As long as the user writes spells on it, he can cast all kinds of magic. Who is the full-time mage? Devil's Passport: Unconditionally obey all the user's instructions and refuse to be a licking dog. If the goddess chases me, all I need is a passport! Time Stopper: Mute the world and listen to the sound of the demon's heart breaking Any door + time machine: If I master time magic + space magic, how should you deal with it? What? You say one contracted beast is not enough? Then I think Doraemon is still around!