Aeri, Martya Sorceri

Prevent all noncombat damage dealt to Aeri, Martya Sorceri.
Whenever a player casts a spell that targets a creature, you may pay {2}{w}{u}. If you do, redirect that target to Aeri. Then, gain X life.
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"The Sorceri... once served to help people. Now, they are responsible for so much death... I must repair the damage these monsters caused."