Welcome to Simic week. As you may know, I've been trying to create a mechanic for each of the ten guild of Ravnica. Modify is my Simic mechanic. I think it conveys the flavor of the research of the Simic guild by rewarding you with another card for a small mana investment.
As this is the first iteration of Modify, I made the cost a simple 2 colorless. There are other cards that have different Modify costs. You'll notice the mana cost of this card is higher than it should be. The correct cost without modify is probably GU, but just being able to modify makes it a bit more expensive.