Bass and Treble

+2: Destroy target artifact or creature with power and/or toughness greater than or equal to the number of loyalty counters on Bass and Treble.
-1: Create Treble, a 3/3 legendary artifact wolf creature token with haste and trample.
-6: If you control both a Bass planeswalker card and a Treble legendary creature token, destroy up to seven non-basic land permanents.