The True Name

Enchant creature
When The True Name enters the battlefield, exile target creature you control with a ren counter on it.
Enchanted creature gets +X/+Y, has flying, and is legendary, where X is the total power of exiled creatures with ren counters and Y is the total toughness of exiled creatures with ren counters.
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This card is dedicated to Usaername. Thanks for the support!