In those days it was highly sought after, highly expensive and restricted, and no one wondered why
Like Saheeli she has a second ability, where at the end of turn you can spend any amount of energy, to make a vehicle token with power and toughness equal to the energy spent, and crew 2 While Pia Nalaar has potential in more aggressive decks, shes much narrower that Saheeli, and Living Energy is built to work with Saheeli in charge
Finally, this version of the deck purposely also doesnt run a Mind Twist
Bonescythe Sliver Brood Sliver Capricious Sliver Cloudshredder Sliver Essence Sliver Fungus Sliver Galerider Sliver Hatchery Sliver Lazotep Sliver Magma Sliver Megantic Sliver Plague Sliver Psionic Sliver Pulmonic Sliver Regal Sliver Sedge Sliver Sliver Legion Sliver Overlord Sliver Queen Spiteful Sliver Synapse Sliver Syphon Sliver Taunting Sliver Thorncaster Sliver Toxin Sliver
I decided that I'm finally going to change that after seeing this card