When are you supposed to finish a quest?

For example, I have a quest that say: 'Kill a dragon', I kill said dragon but there are other cards with the dragon, I am allowed to do them or should I get teleported as soon as I kill the dragon?

frogemoth said:

As soon as you kill the Dragon, the Warlock immediately teleports you to the Warlock's Cave and gives you a Talisman or Quest Reward, before you can do anything else in the space where the Dragon was killed!

Ell.

Ok, thanks for your answer Eli!