Yawgmoth, Phyrexia's Creater

Nonbasic lands are Swamps.
At the beginning of each upkeep create a
black Equipment artifact token named Phyrexian
Oil attached to target creature an opponent
controls with "Equipped creature gets -1/-1 and
when equipped creature dies attach this artifact
to target creature you control" and has equip{b}.
Indestructible