One word of warning before we get to the prices: Ultimate Masters was just released a couple of days ago, and the floor for cards reprinted in a Masters set typically comes a month or two after the set is released, so it's possible (and even likely) that many of the cards we'll talk about today will drop a bit further in price over the next few weeks
It might even be a borderline staple for Blue decks
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
In current Standard, the fact that this can block Slickshot Show-Off and live to tell the tale is a huge deal
Sadly having an island spare is far harder than having a blue card spare as well as much more painful to lose