Drethiteck, Blood sorcerer

Blood gamble— if your life total is even, cards
that are in your graveyard, or are cast from your graveyard have 1 more total mana value, if it is
odd their mana value is 1 less instead.
{b}, Pay X life: Cast target instant or sorcery card
in your graveyard with X or less mana value
without paying its mana cost, if X is 5 or more,
copy that spell.