Tome of the Moon

When you check-out, if you roll a 4 create
Tome of the Moon
{3} or {b},{t}: Each player mills a card. Then
put a -1/-1 counter on up to one target
creature for each non-land card milled this
way
{3} or {b},{t}: Pay 1 life, draw a card. Activate this ability only if you have no cards in hand