Rain, Common 3g
Water
Discards all Searing fire players take 1 damage per Burning card (max4)
(I assume Water is meant to be Aqua.)
This is a little too specific in its function to be considered in most decks. As aqua, it's an inexpensive way to trigger the keyword, but in any other case it's likely to be a dead draw. You may want to add some effect to make it useful in the event that your opponent is not using a Burning strategy.
Keeping with the theme of the card, maybe it can grant some benefit for every
Wheat farm on hand. =D