LIanowar, wurm caller

+3: create a 10/10 wurm with trample.
-X: search your libaray for X land cards and put them onto the battlefield, then shuffle your libaray.
-7: choose one: put ten +1+1 counters on each creature you control or create a 10/10 wurm trample or create ten 1/1 insects with infect, unblockable