Celestial Soul Ascension

Whenever a nontoken creature you control
would die, you may instead have it become an
enchantment and lose all other card types.
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"It is said that when one dies, the soul lives on forever
in the heavens as a star. On a clear day, one can
see these souls ascending, illuminated by Aa's light."
—Annal of Ronand Brite, Clergyman of Aa -
Volume LXII