Brakkus, the All-Seeing

Immunity (This creature can't get -1/-1 counters.)
Tether (This creature can't be exiled or returned to
its owner's hand.)
{b/g}{w/b}{b}: Brakkus, the All-Seeing gets +2/+2 and
gains shadow until end of turn. (Activate this
ability only during your pre-combat main phase and
only once each turn.)