Moon-Blessed Cleric

Divine Intervention — When Moon-Blessed
Cleric enters the battlefield, you may search
your library for an enchantment card, reveal
it, then shuffle and put that card on top.

After becoming undead, she visited the Dark
Sun Gwyndolin at the Mausoleum of the Spiral
Depths, became a Blade of the Darkmoon, and
assumed the flame-keeping duty.