Note that theres very little of value to tutor up with Primeval Titan (just Adventurer's Inn, Eden, Seat of the Sanctum, and The Gold Saucer)
Cast it normally and you'll get a diminutive but powerful Flying creature that allows you to draw cards equal to the number of opponents who took combat damage this turn (depending on how aggressive you are, this could be quite a lot)
Then do it again.) When Roalesk enters, put two +1/+1 counters on another target creature you control
Whenever they enter the battlefield or attack, you can venture into the dungeon
That's without even mentioning that most players won't survive if you manage to untap and swing with her twice
On top of making ridiculously large zombie tokens for just casting creature spells, undead Oketras also just a house on its own