Add 3 Hornet Nest to sideboard.
Modify sideboard.

+1 Harness by Force
+1 Frenzied Goblin
+2 Mountain
+3 Ashcloud Phoenix

-1 Trumpet Blast
-3 Jeering Instigator
-1 Barrage of Boulders
-1 Crater's Claw
-1 Chandra, Pyromaster
Replace all Borderland Marauder by War-Name Aspirant.