Nature's Resolve

Creatures you control have base power and
toughness 2/2 and are elementals in addition
to their other types.

If one or more -1/-1 counters would be placed
on a permanent you control, that many +1/+1
counters are placed on it instead.

If one or more +1/+1 counters would be placed
on a permanent you control, twice that many are placed on it instead.