While it isnt quite as prominent in Modern as it is in Legacy/Vintage just yet, these early signs are definitely encouraging for Tezzeret
Across the history of Magic : the Gathering , White has built a reputation as the color of protection, order, and value - especially in Commander
On top of that, you may also want to include some creatures that ramp such as Solemn Simulacrum , Burnished Hart, Palladium Myr, etc
Koma, Cosmos Serpent - The mana cost on this one is hefty, but theres some serious power here nonetheless
Notice how the black of the mana symbol is completely black throughout
Credit: Wizards of the Coast Credit: Wizards of the Coast Mishra, Claimed by Gix BPhillipYork: The original dragon engine was so corny looking, this one, not corny looking