If I cast a Painter's Servant and I choose green can I from now on pay for all my spells using forests even those that have drops in them instead of trees?
If I cast a Painter's Servant and I choose green can I from now on pay for all my spells using forests even those that have drops in them instead of trees?
No. Changing a card's colour doesn't change its cost - you still need to appropriate colour to cast them.
Fluttershy is best pony.