Mavra, blightsteel Masticore

During your upkeep, you must discard a card, or sacrifice Mavra, Blightsteel Masticore.
When you cast a spell, you may pay {2}, if you do,
that spell gains delve.
{w}{b}{r}: You can cast spells from your graveyard
until end of turn.
She found herself falling apart, and tore into others
to repair herself.