Yuna is given an opportunity to fight Shiva at the Calm Lands in an aeon battle with Belgemine. The player must beat Shiva and all of Belgemine's aeons to receive the Aeon's Soul item that will enable aeon development. The player will also receive 30 Power Spheres. Every other battle won against her will earn 30 Speed Spheres. Furthermore, the player needs to beat Belgemine at Remiem Temple to obtain the Moon Sigil, in conjunction with 60 Mega-Potions. Every other battle won will earn the player 6 Star Curtains.
In the first battle, the opposing Shiva has 15,000 HP and 900 MP. She absorbs any ice attacks, and is immune to status ailments and any break attacks.
At the Remiem Temple battle she has 20,000 HP and 950 MP. Her immunities, weaknesses and absorptions are the same.
Yuna also encounters Shiva as an enemy inside Sin. Shiva's stats are identical to that of when being summoned, except for MP and Luck which are both always 1.
Shiva's attacks are comprised of her usual physical attack, Heavenly Strike and Diamond Dust, as well as Blizzara and/or Blizzaga depending on which battle. Heavenly Strike inflicts Threaten in the Calm Lands battle, a weak delay in the Inside Sin battle, and a moderate delay in the Remiem Temple battle. In the Calm Lands battle, Shiva does not use Diamond Dust, but merely uses Heavenly Strike as her overdrive.