Shifting Seasons

Cold Season-If blue mana was spent instead of green, spend a black mana and reduce all creatures stats by -2/-2 or spend a red mana to do 4 damage to an opponent or planeswalker
Warm Season-If green mana was spent instead of blue, spend a black mana to chose 2 creatures and reduce their attack by 2 then increase their base health by 2 or spend a red mana to grant all creatures you play this turn haste