As their friendship grows, Tara starts to support Willow in various magical spells. Tara helps Willow float a rose, the intention being to use their magic’s to pluck it’s petals off (one at a time). Willow tells Tara this is a test of synchronisation (as their minds have to be perfectly attuned to work as one). The spells not entirely successful however, as they loose control of the rose and it flies around the room (bouncing off the walls), and they end up burning all the petals off in one go (owing to interference from some darker magic that’s at work that evening).
Later, when Willow first introduces Tara to Buffy, a test of their new friendship occurs, as Tara tells Willow that Buffy is not herself. Being able to read Buffy’s aura, Tara tells Willow that there’s something wrong with Buffy’s: its fragmented (like something was forced in), whereas it should be aligned (having energies that flow in unity). Tara tracks down a spell that Willow can use to travel to the “Nether Realm”, where Willow can find out what’s happened to Buffy. Tara says that the journey shall be like astral projection (i.e. very intense), and that she shall have to be Willows anchor (to help keep her on this/earth’s plane). The spell involves Willow and Tara forming a protection circle, by moving their arms around them (in a semi-circle), which eventually leads to the circle being traced by fire. Willow is then able to enter a state of trance, where she travels to the “Nether Realm” and sees that Buffy’s soul has been swapped with Faith’s (that of a “bad” vampire slayers). Willow and Tara are then able to conjure a “magical device” that can swap Buffy’s and Faith’s souls back.