Up to fifteen cards may be included in your sideboard, if you use one
Personally, I spent the break at my partners parents house, which is in the middle of a big farm in a rural area about an hour out of Christchurch (Christchurch is the biggest city in the South Island and the third-biggest city in New Zealand
When would you want to give your opponents guys lifelink
Typically Mentor is used as a discard outlet as it is hard to find ones that are not pretty poor on their own and that are cheap and so often finds himself in decks with Fauna Shaman, Genesis, Vengevine, Basking Rootwalla and Survival of the Fittest
Not so good in a deck where you plan to hard-cast it once, and only once
Worldgorger Dragon combos are notoriously all-in and properly timed removal from an opponent can spell disaster