You can generate a bunch of mana with green, draw a bunch of cards with blue, then deal a bunch of direct damage with red, with some nice crossover between all three in the middle
That means that everyone gets more of what they love, and less of what they dont
Awaken the Woods This Green double to start X spell is an absolute classic here
The types of cards players choose should also take into consideration what their opponents deck might have
I have yet to need to cast it for zero mana, but I do love having that option so you can safely tap out to play something cool but still have some protection from some crazy artifact or enchantment combo
And so, dearest reader, we present to you the actual most disgusting creature in Magic: The Gathering