Gisa and Geralf, Corpsemasters

( melds from Gisa, Grand Ghoulcaller and Geralf, Sticher Supreme )
Whenever a non-token creature dies, exile it with a storage counter.
{x}: Remove a storage counter from a card in exile with mana value X or less, create a token copy of that creature thats a zombie in addition to its other types.
{2}: Remove a storage counter from a card in exile, then put a +1/+1 counter on a zombie creature you control, if the exiled card had flying also put a flying counter on that creature, the same applies for dou