Zombie tribal decks immediately spring to mind, and cant wait to slot one in my Narfi, Betrayer King deck
I therefore dont blame the design team for completely neglecting the potentially broken stuff you can do with a Primeval Titan, but my guess is, that they did not think this through completely
This way, you can create an unforgettable atmosphere of the battle
Simic Flash doesn't want too many tapped lands because it really wants to be able to play its spells on curve and eventually play multiple things in a turn (like countering a spell and playing a creature), which means that dropping Thornwood Falls for Breeding Pool is essential, although just four copies of Breeding Pool will set you back somewhere around $80
It's still doing energy things though, with Saheeli, Radiant Creator accruing this resource whenever you cast an artifact or energy spell
If Wizards felt really brave they could even stick it in a Commander precon deck