Elemental Counters

Plasma Counters (if a creature has at least one
Plasma counter on it, at the beginning of that creatures controllers upkeep, that creature takes
X damage equal to the number of plasma
counters on it, removed all plasma)
Acid Counters (if a creature has at least one acid counter on it, at the beginning of that creatures controllers upkeep, that creature takes damage
equal to half of the number of acid counters
rounded up on that creature and remove one
acid counter from it)