Once an item glimmer is played it remains in your playing field even after it has been exerted, with the only way for your opponent to banish it being through using abilities or other action cards
This is a Ghostflame Sliver
Absolute Virtue Aettir and Priwen Clive, Ifrit's Dominant Cloud, Midgar Mercenary Cloud, Planet's Champion Emet-Selch, Unsundered Esper Terra Gogo, Master of Mimicry Hades, Sorcerer of Eld Ifrit, Warden of Inferno Kefka, Court Mage Kefka, Ruler of Ruin Lightning, Army of One Sephiroth, Fabled SOLDIER Sephiroth, One-Winged Angel Sephiroth, Planet's Heir Terra, Magical Adept Vivi Ornitier Y'shtola Rhul Yuna, Hope of Spira
The idea here is to cast many noncreature spells, deal damage to your opponent spellslinger-style, and use this extra power from Vivi to add more mana
Its unfortunate for games