Sebek, Soul-Scar Lich

Spells and abilities you control have wither.
(It deals damage to creatures in the form of -1/-1 counters.)
2{p/r}{p/r}{t}: Deal 1 damage to all creatures.
{1}{p/b}: Move one -1/-1 counter from Sebek, Soulscare Lich onto another creature you control.