Lucifer, the Lame-O

Flying, First Strike, Trample, Haste
All other creatures you control have -1/-1.
Lucifer's power and toughness cannot change,
unless his controller chooses to worship, or not
to worship God. Each time controller worships
God, Lucifer gets -1/-1. Each time controller can
not, or chooses not to, Lucifer gets +1/+1.
"It's not a f---ing phase, GOD!!!"