Obama, Liquidator of Truth

When Obama, Liquidator of Truth enters the
battlefield, destroy target permanent an
opponent controls, then Proliferate, (Choose any
number of permanents and/or players, then give
each another counter of each kind already there.)
Trample, first strike, vigilance, lifelink
{1}{w}{w}{b}{b}: Destroy target planeswalker an
opponent controls, then proliferate.