Ygvuc, Undead Lich

Delve (Each card you exile from your graveyard
while casting this spell pays for {1}.)
If Ygvuc, Undead Lich is in your graveyard, you
may cast creatures from your graveyard if you
pay an additional 5 life.
You may cast Ygvuc, Undead Lich from your graveyard.
Dredge 4, Undying