Sparkling Souvenirs

Ore and Crystal permanents you control have prismatic. (Cards with prismatic are all colors.)
Whenever another permanent enters the battlefield under your control, for each color it
is, add one mana of that color to your mana pool.
"I used to have a lot more, but I got rid of those that tried to eat me or trap my soul. How can such fine gems be so nasty ? "
- Grayvan Klenn, to Telian