Ragavan Joins the Rakdos

Flip a coin 5 times. For each result that is a heads,
you lose 3 life and make a treasure. For each
result that is a tails, deal 2 damage to any target
and exile a card from your graveyard.
Until the end of your next turn, you may cast
face up nonland cards from your exile by paying
their cost plus 2 generic mana and 1 life