Alien Synch 5 (You may sacrifice two or more Alien creatures you control whose combined total converted mana cost is 5. If you do, you can cast Cosmic Fortress Gol'gar without paying its mana cost.)

{X}, {T}: Put X -1/-1 counters divided as you choose among any number of creature permanents your opponent controls.

{W}{U}, remove two -1/-1 counters from target creature an opponent controls: destroy target nonland permanent an opponent controls.