The following spells are not preview in options panel when hovering the mouse over their respective glowing button options:

• Mage's Pyroblast!
• Priest's Flash Heal

This is due to the fact that these spells are automatically replaced by another version when their respective effects proc:

• Mage's basic Pyroblast is replaced by Pyroblast!
• Priest's basic Flash Heal is replaced by Flash Heal