Astrologian's Planisphere
Job select (When this Equipment enters, create a 1/1 colorless Hero creature token, then attach this to it.)
Equipped creature is a Wizard in addition to its other types and has "Whenever you cast a noncreature spell and whenever you draw your third card each turn, put a +1/+1 counter on this creature."
Diana — Equip 
Illustrated by Josephine Chang
This printing
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The Hero token enters as a 1/1 creature, then the Equipment becomes attached to it. Abilities that trigger when a creature enters the battlefield see that a 1/1 creature entered the battlefield.
You may pay the Equipment's equip cost as normal to move it from the Hero token to another creature you control.
Astrologian's Planisphere doesn't need to have been attached to a creature you control when the first or second card is drawn for the granted ability to trigger. As long as a creature you control has the granted ability when you draw your third card in a turn, that ability will trigger.
If the Hero token is destroyed, the Equipment stays on the battlefield.
If the job select ability causes two Hero tokens to be created (due to an effect such as that of Doubling Season), the Equipment becomes attached to only one of them.
