Lune, wolf form

as an additional cost to summon this creature sacrifice "lune, human form"
{b}{b}{t}: summon a 1/1 black ghost token with "{1},
sacrifice this creature, summon a creature from
your graveyard for {2} less"
{b}{b}{b}{t}: choose one:
• summon 2 ghost tokens
• exile 2 target creatures
• target creature gains lifelink