Does Forecaster activate vision when played alone, and if you have multiple Forecasters in play, does playing a mech trigger vision multiple times?

Ruling: Yes, Forecaster activates vision when played alone because it's a passive effect that includes itself. Multiple Forecasters do stack, so playing a mech with multiple Forecasters in play will trigger vision multiple times.

Sequence:

• Each instance of vision triggers separately
• When each trigger resolves, you look at the top card of your deck
• For each trigger, you choose whether or not to recycle that card

Nuances:

• If you don't recycle the top card and nothing else happens between triggers resolving, each instance of vision will see the same card
• This means you could look at the same card X times in a row if you don't recycle it
• You can recycle through your entire library this way if desired