Until then, why not come (re-)familiarize yourself with the world of FINAL FANTASY
And, if a current character is threatening the field, you can keep your cards readied so they can't be challenged and protected, thanks to her Ward ability
Their trigger reads, Whenever a land enters the battlefield under your control, you may gain control of target creature for as long as you control Roil Elemental. So, basically, as long as you can keep Roil Elemental alive, you can absolutely steal every other Creature on the battlefield
I see her fairing better in the long run, however, than the location/song cards on this list given her status at Disney Princess
The first player can finish their turn as normal from there, either by playing a character, item, action, or song or taking some other available action or no action at all
Its somewhat useless in the Merfolk deck with plenty of better options, but in a dedicated Wizards deck, it provides quick ramp into your best spells and a Wizard on the battlefield for Wizards Lightning and Wizards Retort