Hi! I have wery goot idea!
Enwiromments and postures have bonuses and penalties.
Sandstorm. heal rock, steel, ground types. Other types take a damage from sandstorm.
Hail storm. Heal ice types, don't hurt fire, take damage to other types. 2x damage to grass.
Zenith. Heal fire and grass, other types take damage.
Inmaterialithm. Physical cards don't work!
Antymagic zone. Special cards don't work!
Rain. Heal water, electric and grass, take damage to other types. 2x damage to fire and grount.
Undergrount. Flying mowes don't work, grount moves have 3x more power.
Echo. Sound mowes have 3x more power. Echo is ordinary attack, but this shoult be enwiromment.
And more! Please, thought about this and thought about other cards enwiromment and posture.
ice, fire, water, thunder.