Magus of the Coffers and Pili-Pala in your graveyard.
Necrotic Ooze does not have summoning sickness.
You control at least four Swamps.
({2} magic symbol) availabile.
Steps
Activate Necrotic Ooze using Magus of the Coffers' ability by paying ({2} magic symbol) and tapping it, adding at least ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Activate Necrotic Ooze using Pili-Pala's ability by paying ({2} magic symbol) and untapping it, adding one mana of any color.