Plaguefall

All Glyphid creatures you control become
Rockpox in addition to their other types. Rockpox
creatures you control gain +2/+3.
Creatures you don't control gain -1/-0.
At the start of your upkeep, you may sacrifice any
number of Rockpox creatures. Gain control of a
creature with toughness equal to or less than the
converted mana cost of all creatures you sacrificed.
It becomes Rockpox in addition to its other types.
"Miners, an insidious lithophage, a sickness of the
very rock beneath our feet,