Winnie, Sanderson Siphoner

Partner with Mary, Sanderson Seeker and
Sarah, Sanderson Siren
If Winnie isn't your only commander, your
starting hand size is six. Skip your first draw step.
{1}, {t}, Sacrifice a creature you don't own: Put a
+1/+1 counter on each Warlock you control,
draw a card, and add {u}{b}{r}.