Quirrel, Archivist's Heir

+2: You gain 2 life. Investigate.
-1: Choose a creature. Until the start of your next turn, if that creature would attack or block, Quirrel, Archivist's Heir deals 5 damage to it.
-6: For each non-basic land permanent you own and control with mana value less than 3 or more than 6, investigate.