Cast Murderous Redcap by paying ({2} magic symbol) ({BR} magic symbol) ({BR} magic symbol) , which enters with a +1/+1 counter on it due to Master Biomancer.
When Murderous Redcap enters the battlefield, it triggers, dealing an amount of damage to itself equal to its power.
Murderous Redcap dies as a state-based action due to having 0 toughness.
Murderous Redcap's persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Master Biomancer.