Despite taking two attempts to complete the introduction I didn't encounter that card, so I am assuming there is an interaction I didn't make, a random event I did not encounter, or perhaps something gets added to the scenario by completing one of the threats. Destinies - as you continue to add new cards to your deck you will probably want to remove weaker cards, especially half-star ones. Also, since the cards you gain are semi-random, you might somtimes have to take a card you don't really want in your deck. More cards is not necessarily better.
First question - the symbol is on the terrain card, so applies to actions taken when your figure is on that card. i.e. it will apply when you are on that card and make a move action to go to another card. Only when the move action is complete do you arrive on the card you have moved to.
Second question - I had this question too, but found the anwer on page 17 of the rulebook. An effect/action on a permanent event card is available to characters on the terrain card it is linked to. So, if you are on the terrain card and do ANY action, you could also apply that effect. Note that you need to have an action to apply it to (which could include moving off the terrain card, exploring an adjacent explore card, playing a card from your hand, etc.) you can't just do the effect on its own.
