+1: venture into the dungeon (enter the first room or advance to the next room.)
-2: look at the top six cards of your library. you may reveal a creature card from among the and put it into your hand. if it's legendary, you gain 3 life. put the rest on the bottom of your library in a random order.
-7: you get an emblem with "creatures you control have trample and haste and get +2/+2 for each differently named dungeon you've completed.