Aki, Consumed by the Past

Vigilance, menace
Magecraft—Whenever you cast or copy an
instant or sorcery spell, you may draw a card and
lose 1 life. If you do, put a nightmare counter on
Aki, Consumed by the Past. Then, if there are 5
or more nightmare counters on Aki, remove all
of them and transform her.
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Her past eats away at her.