Pestilence by paying ({B} magic symbol) , dealing 1 damage to each creature and each player.
Each creature your opponents control dies as a state-based action due to having 0 toughness.
Repeat each turn as desired.
Notes
This lock can be repeated multiple times during a single turn if you have mana available. However, this damage also stacks on your creatures - and if
Maha dies then the lock ends. This lock will also destroy any creatures you control with toughness 1. As it does 1 damage to each player every time you activate it, you must stop once your life total hits 1.
Results
Destroy all creatures opponents control during each turn.