It's important to reveal the first card you draw each turn (or choose not to reveal it) before it is mixed with the other cards in your hand. You look at the card as you draw it before choosing whether to reveal it.

If the card leaves your hand before Inquisitor Eisenhorn's triggered ability resolves, you'll still create a Cherubael token.

You don't have to reveal a drawn card if you don't wish to create a Cherubael token.

Multiple card draws are always treated as a sequence of individual card draws. For example, if you haven't drawn any cards yet during a turn and cast a spell that instructs you to draw three cards, you'll draw them one at a time. Only the first card drawn this way may be revealed with Inquisitor Eisenhorn's ability.

If you reveal a card this way, it remains revealed until Inquisitor Eisenhorn's triggered ability finishes resolving.

You can reveal an instant or sorcery card this way on any turn to create a token, not just your own, if it's the first card you've drawn that turn.

If an effect puts a card into your hand without using the word "draw," the card wasn't drawn.