Mephisto, Soul Contractor

Flying, Trample, Menace
Demons Contract {2} (opponents may pay 2
mana to put a contract counter on any one of
their creatures)
Creatures with contract counters cant attack
Mephisto‘s owner, but gain +6/+6, Flying,
Trample, and Menace. When creatures with
contract counter dies put them on the battlefield
under your control, regardless if Mephisto is in
the comand zone or on the battlefield.