Scepheris, Spawn of Sorrow

Sacrifice a skeleton: Scepheris, Spawn of Sorrow gains wither and +0/+1 until end of turn.
Sacrifice a skeleton: Scepheris, Spawn of Sorrow gains first strike and +1/+0 until end of turn.
Sacrifice a skeleton: Scepheris, Spawn of Sorrow gains regenerate until end of turn.
{b}{b}: Target skeleton gains regenerate until end
of turn.