Ionatán, The Oni

At the beginning of each players upkeep each player makes X 1/1 black stab zombie token were X +1 is the number cards in your graveyard.
{1}{g}{g}, zombie tokens get +X/+X were X is the number of opponent's
{p/r}{p/r}{p/r}{p/r}, pay X life: Ionatán,The Oni gets +X/+0 and can not gain hast or trample.
{1}{u}{b}, pay 8 life sacrafice Ioantán: each player returns a creature from there graveyard to play
Dredge 7