Spreading X damage among creatures generally isnt an efficient use of mana in Commander, especially when you have X spells that deal global damage
Mana Ramp These are definitely the ramp spells Id expect in a green deck, though I might replace one of the two-mana ramp spells with a Kodamas Reach since you want to keep hitting your land drops each turn, powering up your X-spells
But even in that corner case, you can still activate the Clue since you don't need to tap it to activate it
Top Colorless Draw Cards in MTG Magic: the Gathering (Non-Artifact) So, you want card advantage outside of your deck colors
Its that time again, and it doesnt feel like its been that long since Oath of the Gatewatch, does it
Three of your favorite ponies neigh into the fray, one of them with a double-sided surprise